scholarly journals DIACHRONIC DEVELOPMENT OF LOCAL LINES AND RELATED GROUPS OF BROWN CARPATIAN CATTLE FOR GENERATIONS

2020 ◽  
Vol 59 ◽  
pp. 142-159
Author(s):  
A. Ye. Pochukalin ◽  
S. V. Pryima ◽  
O. V. Rizun

In domestic theory of breeding line breeding takes the leading place, because it uses the valuable genetic material of the bull’s leaders. Numerous studies have continuously monitored the economically beneficial traits of animals of different lines, both within breeding herds and in the general breed population. The Brown Carpathian cattle of the combined direction of productivity were officially recognized as breed and, accordingly, had all components of the breed structure (local lines and families). It should be noted that this breed has disappeared taking into account the fact that there has been no active (breeding) population since 2011. The purpose of the study is the schematic location of the bulls of the Brown Carpathian breed lines in generations, as well as the characterization of line extensions indicating the production of mothers. The material of the study was the State Books of Breeding Animals of eight volumes (1948, 1968, 1972, 1975, 1978, 1983, 1987 and 1992). Catalogs of dairy breed bulls for 1985–1988 were also used to evaluate the bull’s lines and groups. Since 1972 (the time of the official recognition of the breed) and until now (in the form of genetic material that is concentrated in cryobanks) the Brown Carpathian breed has the following local lines and related groups: Pishty 10 KAZ-67, Malchyka 3 KAZ-145, Shoni 6 KAZ-81, Fitsko 33 KAZ-107, Yury 32–Iuvelira 273, Kaplara 43 KAZ-9, Sokola 553 KAZ-182, Siroho 1759 KAZ-70, Bondi 101 KAZ-25 and Muki 100 KAZ-22 and Valsa 1205 KAZ-171. The total number of bulls under study is 535 heads, including the 1st generation – 109 heads, the II generation – 111 goals, III generation – 126 goals, IV generation – 99 goals, V generation – 65 goals, VI generation – 24 goals. and VII generation – 1 head. The investigated bulls were born during 1939… 1990 years. The related group of bull Bondi 101 KAZ-25 in the genealogical structure of the Brown Carpathian breed did not spread. The main reason was the small number of bulls. The bull was born in 1948 in the collective farm. Lenin of Mukachevo district of Zakarpattia region. Kappa’s 43 KAZ-9 local line. The ancestor of the line was born in 1944 and came from bull Shoni 2 and Montsii (8–300–4800–3.84). The live weight at the age of Kaplar 43 was 920 kg at the age of 11 with 82 points for the exterior. Local line of Malchyka 3 KAZ-145. The line's founder was born in 1948 and belonged to the collective farm. Dimitrov Mukachevo district of Zakarpattia region. Its origin is unknown. The Sokol’s 553 KAZ-182 local line. The founder of the line was born in 1949 and belonged to the collective farm "For a new life" of the Irshava district of Zakarpattia region. Its high live weight (5 years 840 kg) and body dimensions (height at the withers 145 cm, oblique torso length 180 cm, girth of the breast 220 and pestle 21 cm) ensured the animal’s mass. The related group of bull Muki 100 KAZ-22. The founder of the factory line was born in 1949 and had a brown suit and belonged to the collective farm. Chapayev. It was born of the Malyny 719, which received 4922 kg of milk for the fourth lactation and the bull Buki 220 of the Brown Swiss breed. The related group of bull Siroho 1759 ZCP-70. The founder of the bull Siryi 1759 was born in 1962 year. The live weight of 920 kg bull at the age of 5 years with 85,5 points for the exterior. The local line of Fitsko 33 KAZ-107. Bull Fitsko 33 has brown suit, was born in 1948, and belonged Zakarpattia Regional Agricultural Research Station. In the 12 years of its live weight was 840 kg. The local line of Pishty 10 KAZ-67. Pishty 10, the line's ancestor, was born in 1947 and was brown. He was born to a high-yielding cow Senesha 10, from which 2 lactations received 6240 kg milk of 3.7% fat, and bull Shandora 1. The Shoni 6 KAZ-81 local line is one of the leading in the Brown Carpathian breed. The ancestor of the line was born in 1949 from cow Fania 171, which for the 4th lactation yielded 4800 kg of milk with a fat content of 3.7% and the Fidelio bull of the Brown Swiss breed. The local line of the Yuri 32 KAZ-8-Yuvelira 273 KAZ-162 is the most numerous and branched in the Brown Carpathian breed. The ancestor of the lineage bull Yura 32 was born in 1943 from the cow of Cavia 517, from which for the 2nd lactation received 3014 kg with a fat content of 3.75%. Its live weight at 4 years was 850 kg. The related group of bull Valsa 1205 KAZ-171. The founder of Valsa 1205 was born in 1961 years. At 2 years of age, it had a live weight of 545 kg and a high exterior rating of 90.5 points. It came from Venetsia 564 (3–299–4416–3,6) and the Brown Swiss bull Iltis 7623. The genealogical structure of line breeding and related groups is presented covering the period of the birth of the bulls during 1939 ... 1990 and has 535 goals. During this time, local lines were tested and related groups were formed. The production lines of Pishta 10, Fitzko 33, Shoni 6 and Yury 32-Yuvelira 273, were the most numerous, and the number of bulls in each exceeded 70 goals. Less numerous (›6 goals) were the related groups of the Bondi 101 and Valsa 1205. Each group related to the ancestor has its twigs and branches.

1969 ◽  
Vol 72 (2) ◽  
pp. 229-245 ◽  
Author(s):  
W. H. Broster ◽  
Valerie J. Broster ◽  
T. Smith

SUMMARYEighty Friesian heifers were used to study the effect on milk production of two fixed levels of intake at two stages of the lactation. The rations were estimated to contain 7·9 and 6·2 kg starch equivalent per day, with adequate protein content. The heifers were allocated at random to these two levels of intake for weeks 1·9 of lactation and re-allocated at random to them for weeks 10–18 of lactation. Apart from minor variation the heifers were all fed alike for the remainder of the lactation.The higher level of feeding increased yields of milk and milk solids and solids-not-fat content in each period but had a smaller effect in mid- than in early lactation, a trend which was shown to continue further into later lactation. It also conserved body reserves.There was a residual effect in weeks 10–18 from the level of feeding in weeks 1–9 of lactation. This was directly additive to the effects of the current level of feeding. Those animals which had received the higher level of feeding in weeks 1–9 yielded more milk of higher solids-not-fat content than those which had had the lower level of feeding in weeks 1–9. The former group gained less live weight. The effect on milk production over the full lactation from additional feeding in early lactation was three times that observed in early lactation itself. Additional feeding in mid-lactation did not have a residual effect.The absolute output of milk per unit of food over the 18-week period was greatest for that group which had received the lower level of feeding throughout, followed by the group which received the higher level of feeding in weeks 1–9 only. This superiority was achieved at the expense of body reserves. There was a negative regression of live-weight change on milk production.Estimated intakes of metabolizable energy agreed closely with requirements for milk production as indicated by the Agricultural Research Council (1965).


1964 ◽  
Vol 4 (15) ◽  
pp. 386 ◽  
Author(s):  
WA Pattie ◽  
AC Godlee ◽  
PE Bouton

During 1961 and 1962 experiments were conducted at Tamworth Agricultural Research Station to evaluate the effect of several castration treatments and of the poll gene on prime lamb production. Ram lambs and lambs sterilized by removal of the cauda epididymis had significantly heavier live weights at 16 weeks of age than did partially castrated lambs (half of each testis removed). These in turn were significantly heavier than wethers and ewes. Among single lambs, rams and sterilized rams had carcasses that were nine per cent heavier than those of wether and ewe lambs (P<0.01). With twins this difference was reduced to 1.3 per cent for wethers (n.s.) and eight per cent for ewes (P<0.05). The average carcass weight of partially castrated lambs was between these two groups. Mean horn volumes and preputial adhesion scores suggested that these lambs had less endogenous androgen than rams and sterilized lambs. All single lamb carcasses were classed as First Grade. There were no significant differences in the number of twin lambs that were down-graded in each treatment. Fifty-four per cent of the ram and sterilized ram carcasses were classed as Ram and would be subject to a price penalty regardless of their carcass grade. Taste panel tests of meat from the hind legs of wether and sterilized ram carcasses showed that the sterilized ram meat was slightly more acceptable. There were no significant differences in live weight, carcass weight or carcass grade between polled and horned lambs.


2020 ◽  
pp. 6-10
Author(s):  
S.V. Ruda ◽  
◽  
O.V. Ryabinina ◽  
V.O. Melnyk ◽  
L.M. Palval ◽  
...  

Aboriginal breeds and bird populations are a valuable genetic resource. Characterized by relatively low productivity, they exhibit high viability and good adaptability to the local conditions in which they were formed. Due to these positive qualities, they are in high demand among the population and have been successfully used in various breeding programs. Therefore, their conservation is receiving much attention worldwide. Not so long ago, Poltava chickens, or as they were called, were widely known in Ukraine. The breed included three varieties: Poltava Clay, Poltava Creep and Poltava Black. But gradually the last two varieties were lost under the pressure of industrial lines and crosses of chickens. Given the urgency of the problem of conservation of the domestic gene pool of poultry, the purpose of the research conducted in recent years by scientists of the State Poultry Research Station of the NAAS, was to resynthesis chickens with crested and black plumage and evaluate their economically useful features. The genetic material of the Poltava clay breed and two populations of Birkian meat-and-egg chickens with black and blackstriped plumage color were used. The synthesis of new genotypes of chickens was carried out by hybridological and recombination methods, and the further consolidation of the two populations created was breeding. The resulting population with cuckoo plumage was named Ukrainian cuckoo, and with black plumage was Ukrainian black. The bird of new Ukrainian populations has the following economically useful indicators: live weight of cocks – 2.6-3.4 kg, chickens – 2.0-2.7 kg; laying of chickens – 113-125 eggs for 28 weeks of productivity. The eggs have a mass of 54-65 g and the cream color of the shell. Currently, this bird is bred at the experimental farm of the National Academy of Pedagogical Sciences of NAAS and is successfully sold to farmers and amateur poultry.


2021 ◽  
Vol 61 ◽  
pp. 57-63
Author(s):  
P. P. Dzhus ◽  
L. O. Dedova ◽  
T. V. Ezhik ◽  
O. P. Vergeles ◽  
G. M. Bondaruk ◽  
...  

Introduction. In the structure of meat cattle breeding in Ukraine already a long time the leader in the number among of breeds of foreign origin there is a Aberdeen-Angus. This breed, due to its high manufacturability, is intensively used as a genetic material in the breed-forming process and increase the production capacities of the pedigree base of cattle breeding. At one time, the most intensive works on the development of the breed was conduct on the basis of the SAE "Main Breeding Center of Ukraine". Thanks the validity state support was organized the estimating of bulls for their own productivity and quality of descendants, was formed a bank of deep-frozen sperm and embryos, were created informative electronic card indexes of individual data of pedigree animals. This determines the expediency of analyzing the features of the formation of the genealogical structure of the population of the Aberdeen-Angus breed on the basis of the study of individual herds, which becoming the purpose of this work. The purpose of this work was to investigate the genealogical lines and families in the herd of Aberdeen-Angus breed in SAE "Main Breeding Center of Ukraine". Research materials and methods. The study of the genealogical structure was carried out on the basis of data primary zootechnical accounting in the format of SMDC "Orsek-M", expeditionary examination of the herd and the results of a comprehensive individual estimating of animals. Biometric processing of data was carrying out according to the method of N. A. Plokhinsky with using the software Microsoft Excel. Research results. As of 01.01.2021 year, in the herd of the enterprise total accrued of 155 heads, including 84 cows, which now fertilization of the method of natural mating bulls, purchased from the LLC “Ratnivsky Agrariy”, which obtained by method of artificial insemination of high-producing cows of the 2nd and older calves sperm of bull of Team Z Pecina 4031. Now the uterine stock of the studied herd belongs to the lines Southom Extr – 29 heads, Raito Iver 865 – 18 heads, Villabar 85 – 8 heads, Raito B 1567126 – 7 heads, Vetonk 2446 – 5 heads, Ilinmer Led 173 – 4 heads, Brialhill Sauzerner – 2 heads and the related group Team Z Pecina 4031 – 11 heads. The age of cows fluctuated from 3.1 to 19.2 years, and in the average be 9.8 years. The oldest cows belongs to the lines Raito B 1567126, Brialhill Sauzerner and Ilinmer Led 173, the youngest – to the related group Team Z Pecina 4031 and to the line Vetonk 2446. In the studied herd total detected 23 potential ancestors, which have living descendants of female sex. The most numerous are the families of K. Pride 11212597 – 9 descendants, E. Pride 11153487 – 8 descendants, K. Vessi 10887560 – 7 descendants. The families of Erika 3200797288, Kornela 3200797248, Sara 11756665 and Sandy 951931 presented 5 descendants of female sex of different generations. The minimum age of more than 10 years have the representatives of families of K. Erika 10240733, Beauty 10767437 and Elbe 3200797255, and the maximum age from 18 to 19.5 years – the representatives of families of K. Erika 10240733, Elin 10679739, E. Pride 11153487, Gemmer 10189403. The lowest and the highest average live weight had the newborn heifers the family of Kornela 3200797248 – 24.0 ± 1.7 kg, and the family of E. Pride 11153487 – 33.2 ± 1.5 kg, respectively. The average live weight of newborn heifers in other studied families was following: K. Pride 11212597 – 25.1 ± 0.4 kg; Erika 3200797288 – 28.6 ± 1.6 kg; K. Vessi 10887560 – 29.5 ± 1.5 kg; Sandy 951931 – 30.4 ± 1.6 kg. The average daily gain of live weight of heifers for the period from birth to 12 months of age fluctuated from 615 to 750 grams. The highest and the lowest average live weight at 12 months had the heifers the family of E. Pride 11153487 – 307.0 ± 19.7 kg and the family of K. Pride 11212597 – 249.2 ± 8.5 kg, respectively. Almost identical average live weight had the heifers the families of K. Wessie 10887560 and Kornela 3200797248 – 266.1 ± 11.14 kg and 266.6 ± 6.1 kg, respectively. The age of the first insemination fluctuated from 17.6 months in heifers the family of Erika 3200797288 to 21.4 months in heifers the family of K. Vessi 10887560. The highest average live weight at the age of the first insemination had the heifers the family of Sandy 951931 – 364.7 ± 20.6 kg, and the lowest – the heifers the family of Erika 3200797288 – 303.0 ± 8.8 kg, due to the younger age of their first insemination. Conclusions. Considerable narrowing of the genealogical structure of the modern herd of Aberdeen-Angus breed in SAE "Main Breeding Center of Ukraine" provoke the full absence representatives such classical lines as Ideal 3163, Power Play 8974207 and Showshoun 548. Due to the expansion of the related group Team Z Pecina 4031 will increase the genetic variability, reorganize age structure the uterine stock and direct zootechnical work with families to improve the parameters of individual growth and development of animals.


2017 ◽  
Vol 26 (1) ◽  
pp. 51
Author(s):  
R Chitra, P Hemalatha

The initial growth of turmeric is rather slow and takes about 4-5 months to cover the inter space. Therefore, the available space between the rows of turmeric could be effectively utilized by growing short duration crops like, vegetables, cereals etc. Hence, it is worthwhile to explore the possibilities of growing compatible crops with turmeric. With this background the experiment on effect of intercrops on growth and yield of turmeric was conducted at Agricultural Research Station, Bhavanisagar. Among the different intercrops, turmeric with cowpea recorded the maximum fresh rhizome yield per hectare (30.78 t ha-1) while turmeric + bhendi registered the maximum B:C ratio (2.68:1). Monocropping of turmeric recorded the lowest B:C ratio (1.67:1) among all the treatments.  


2016 ◽  
Vol 52 ◽  
pp. 194-202
Author(s):  
S. L. Voitenko ◽  
L. V. Vishnevsky

The article shows the state of Ukrainian Whiteheaded cattle, which includes distribution of cattle, the number of animals belonging to respective bloodlines, evaluation of young animals with live weight in the process of growing and milk production of cows during the first lactation. It reflects the historic development of the breed when it was colonism whiteheaded cattle, which turned into the original breed, undergone a significant expansion in livestock and increase of productivity, decreased in the number, was as basis for creation of Ukrainian Black-and-White dairy breed and now bred only in one breeding farm. Visual estimation of animal exterior showed good development of cows and calves and their belonging to the dairy type. In the vast majority the cows of the herd have a black suit, a white head with " glasses" around the eyes, white belly, udder, lower legs and brush of the tail. The youngsters aren’t consolidated by the exterior, and among them there are animals which are not typical for Ukrainian Whiteheaded breed. The young animals have some lag in live weight behind the breed standard [12] to 7 months’ age with exceeding of this trait in certain periods quite significantly in the future. It was established that selection of heifers on live weight will be effective at the early age (1-5 months), given the coefficient of variation of live weight – 22,63-30,21% and will not have a significant influence in the future. Milk yields of first-calf heifers vary considerably depending on the origin. The milk yield of first-calf heifers in the herd was 4238,5 kg on average, the heifers belonging to Mart 171 and Ozon 417 bloodlines had the best milk performance – 4483,1 and 4254,9 kg accordingly. The most aligned milk yield during the first lactation was in the cows belonging to Ozon 417 bloodline, the limits of the trait are 4128,5-4327,4 kg with the average value by the line 4254,9 kg. In contrast, the first-calf heifers of Ryezvyi 33 bloodline with average milk yield 4048,9 kg had limits of the trait 2199,3-4736,1 kg. Even greater range in cows’ milk yield during the first lactation R= 4939 kg (limits 1687 – 6626 kg) is characterized for the herd in general, it shows, on the one hand, the possibility of qualitative improvement of cows’ productivity due to selection on the investigated trait and lack of selection in the herd on the other hand. It was established that daughters of bull Chardash belonging to Ryezvyi 33 bloodline produced 4736,1 kg of milk for 305 days of the first lactation with fat content 3,6%, whereas Zlak’s descendants of the same line were characterized by the lowest milk yield for the first completed lactation – 2199,3 kg with fat content 3,7% and the average value by the line – 4048,9 kg of milk, fat content 3,6%. Similar variability of first-calf heifers’ milk yields, depending on the origin, is typical for other bloodlines of Ukrainian Whiteheaded breed. To increase milk productivity of Ukrainian Whiteheaded cows is recommended to repeat successful combinations of parental forms, and to preserve the breed – to carry out an objective assessment of animals by a range of traits, given the efficiency of selection of heifers on live weight at early age.


2016 ◽  
Vol 52 ◽  
pp. 82-94 ◽  
Author(s):  
A. Ye. Pochukalin

One of the ways of increasing level of animal economically useful traits is selection work with farm families. In pedigree cattle breeding of Ukraine families are a statistical component of breed genealogy. Among the main scientific works on working with families, it should be noted minimum number of female ancestors, proposed by D. T. Vinnichuk, to determine the breeding value, different categories, classification and techniques for evaluating related groups of females. The aim of our research was to analyse importance of farm families for genealogical structure of the breed. The research was on basis of data of primary breeding records at the herd of Volyn Beef cattle of “Zorya” breeding farm, Kovel district, Volyn region. Akula 102, Galka 37 and Galka 1537 families belonging to Krasavchyk 3004 bloodline, Smorodyna 613, Korona 2382 and Visla 1016 families – Tsebryk 3888 bloodline, Kalyna 212, Verba 1536 and Garna 536 families – Yamb 3066 bloodlines, Kazka 433, Galka 421 and Bystra 1124 families – Buinyi 3042 bloodline, Rozetka 1313, Arfa 599 and Bulana 943 families – Sonnyi-Kaktus 3307-9828 bloodline, and Palma 275, Desna 870 and Veselka 444 families – Mudryi 9100 bloodline were characterized. Belonging to a bloodline was determined by the father's side of female ancestors. Structural units of families: branches, branching with identifying the best individuals on breeding traits were submitted to identify the best combinations and successful use of closely related breeding. Comparing assessment of related groups of females on the main breeding traits belonging to Krasavchyk 3004 bloodline, it was noted that the cows of Akula 102 family predominated in live weight at 5 years’ age, milk ability and economic use duration, whereas the cows of Galka 1537 family – on traits of reproductive ability. Smorodyna 613 family of Tsebryk 3888 bloodline had high duration of economic use and cows’ live weight at 5 years’ age compared with Korana 2382 and Visla 1016 families with equal values of the exterior traits (height measures) and coefficient of reproductive ability. The families of Mudryi 9100 bloodline in terms of reproduction (calving interval, coefficient of reproductive ability) had the highest figures of cows’ milk ability and live weight. The cows of Bulana 943 family had a considerable predominance over representatives of Rozetka 1313 and Arfa 599 families of Sonnyi-Kaktus 3307-9828 bloodline by main economically useful traits. High indices of reproductive ability were noted in these families. Heifers of the families of Buinyi 3042 bloodline had high live weight at 18 months’ age at average values of milk ability and cows’ live weight at 5 years’ age. More equal figures of growth rate, exterior and economic use duration were observed in the cows of Kalyna 212, Verba 1536 and Garna 536 families of Yamb 3066 bloodline. Breeding by families in beef cattle breeding is an important element of selection, because it allows to evaluate not only related group of female ancestor, but also to analyse a successful combination with lines and purposeful use of closely related breeding by the best representatives of a breed.


Author(s):  
A. Zheltikov ◽  
N. Kostomakhin ◽  
D. Adushinov ◽  
O. Zaiko ◽  
V. Dementev ◽  
...  

The characteristic of milk productivity of cows of Holstein and Simmental breeds in LLC “Sibirskaya Niva” in the Maslyaninsky district in the Novosibirsk region has been given. It has been revealed that under the natural and climatic environments of the Western Siberia, when creating favorable conditions for feeding and housing for cows of Holstein and Simmental breeds have sufficiently high milk productivity. It has been found that Holstein first-calf heifers surpassed their Simmental herdmates by 959 kg in milk yield for the first 305 days of lactation under the same conditions of housing and feeding, by 3,1 kg in daily milk yield, by 38,2 kg in milk fat yield, and by 28,3 kg in milk protein yield (P < 0,001). There were no statistically significant differences between animals of Holstein and Simmental breeds in terms of fat and protein content in milk, which amounted to 3,94 and 2,96 % in Holstein breed and 3,97 and 2,98 % in Simmental breed, respectively. Both breeds have shown high milk productivity during the first 3 lactations. Thus, the milk yield of Holstein cows for the first 3 lactation was 6475–9290 kg, Simmental cows it was 5516–7680 kg, fat content was 3,93–3,99 and 3,96–3,97 %, respectively. The protein content in the milk of cows of both breeds did not exceed 3,0 %. High variability has been found in milk yield, yield of milk fat and protein, the coefficient of milk content and duration of lactation, the lowest in the content of protein and fat in milk and live weight. The correlation coefficients between the fat and protein content in milk were generally positive, but did not exceed 0,28. Therefore, breeding in the herd of cows in LLC “Sibirskaya Niva” have to be conducted not only by fat content, but also by protein content in milk.


2020 ◽  
Vol 51 (4) ◽  
pp. 1139-1148
Author(s):  
Othman & et al.

The research work was conducted in Izra’a Research station, which affiliated to the General Commission for Scientific Agricultural Research (GCSAR), during the growing seasons (2016 – 2017; 2017 – 2018), in order to evaluate the response of two durum wheat verities (Douma3 and Cham5) and two bread wheat varieties (Douma4 and Cham6) to Conservation Agriculture (CA) as a full package compared with Conventional Tillage system (CT) under rainfed condition using lentils (Variety Edleb3) in the applied crop rotation. The experiment was laid according to split-split RCBD with three replications. The average of biological yield, grain yield,  rainwater use efficiency and nitrogen use efficiency was significantly higher during the first growing season, under conservation agriculture in the presence of crop rotation, in the variety Douma3 (7466 kg. ha-1, and 4162kg. ha-1, 19.006 kg ha-1 mm-1,  39.62 kg N m-2respectively). The two varieties Douma3 and Cham6 are considered more responsive to conservation agriculture system in the southern region of Syria, because they recorded the highest grain yields (2561, 2385 kg ha-1 respectively) compared with the other studied varieties (Cham5 and Douma4) (1951 and 1724 kg ha-1 respectively). They also exhibited the highest values of both rainwater and nitrogen use efficiency.


2017 ◽  
Vol 4 (2) ◽  
Author(s):  
SUDHEENDRA A. ASHTAPUTRE

A field experiment was conducted during kharif, 2005 at Agricultural Research station, Devihosur, Haveri, Karnataka to assess the progress of powdery mildew at different time interval of sowing dates. Totally 20 different dates of sowings were imposed in the experiment at an interval of 10 days. The crop sown on last week of May to mid of June recorded minimum disease severity compared to rest of the date of sowings. This clearly indicated that crop sown during this period suffers less, which may be due to low inoculum potential, whereas late sown crop suffers more because of the readily available inoculum in the early sown crops. Low disease severity in last week of May to mid of June sowing may be attributed to the non-congenial weather factors for the development of the disease.


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