scholarly journals EFFECT OF FOLIAR SPRAY WITH SOME FERTILIZERS AND CHEMICALS ON VEGETATIVE GROWTH , YIELD AND ITS RELATION TO POWDERY MILDEW DISEASE OF SQUASH PLANTS CAUSED BY Erysiphe cichoracearum

2007 ◽  
Vol 32 (3) ◽  
pp. 1825-1835
Author(s):  
R. El-Shabrawy ◽  
A. El-Kafrawy
Keyword(s):  
Powdery Mildew ◽  
Vegetative Growth ◽  
Foliar Spray ◽  
Growth Yield ◽  
Erysiphe Cichoracearum ◽  
Powdery Mildew Disease

Insecticide treatments for control of grape phylloxera (Daktulosphaira vitifolii) infesting grapevines in Victoria, Australia

1989 ◽  
Vol 29 (2) ◽  
pp. 267 ◽  
Author(s):  
GA Buchanan ◽  
GD Godden
Keyword(s):  
Vegetative Growth ◽  
Root Zone ◽  
Foliar Spray ◽  
Growth Yield ◽  
Cabernet Sauvignon ◽  
Root Mass ◽  
Grape Phylloxera ◽  
The Third ◽  
Central Victoria

Carbofuran, oxamyl, aldicarb and fenamiphos treatments were tested for control of grape phylloxera [Daktulosphaira vitifolii (Fitch)] on ungrafted Cabernet Sauvignon grapevines in central Victoria. All insecticides were applied as granular formulations to the root zone of grapevines. Oxamyl was also tested as a foliar spray. Carbofuran was the most effective treatment, although aldicarb and oxamyl reduced phylloxera populations at some sampling periods. Fenamiphos did not control phylloxera. Vegetative growth, yield and root mass of infested grapevines declined during the 3 years of the experiment. In the third year, carbofuran- treated vines had significantly (P=0.05) greater fruit yield and more vegetative growth than control vines, but were performing poorly in relation to yields expected from uninfested vines. It is concluded that carbofuran treatment combined with optimum viticultural management may delay or reduce the decline of phylloxera infested grapevines. However, replanting with vines grafted to resistant rootstocks is a preferable long-term solution.

scholarly journals Occurrence of powdery mildew disease of Gerbera in Kerala

2018 ◽  
Vol 13 (2) ◽  
pp. 217-220
Author(s):  
N M Praveen ◽  
Reshmy Vijayaraghavan ◽  
S Beena ◽  
S Krishnan
Keyword(s):  
Relative Humidity ◽  
Powdery Mildew ◽  
Weather Data ◽  
Slight Reduction ◽  
Erysiphe Cichoracearum ◽  
Powdery Mildew Disease ◽  
Golovinomyces Cichoracearum ◽  
A Chain ◽  
Cent Disease ◽  
Summer Decline

A purposive sampling survey on the hilly tracts of Wayanad, Kerala revealed the existence ofpowdery mildew disease in gerbera crops, grown under both protected and open field condition.Among the other fungal diseases of gerbera, powdery mildew disease causes decisive damageto the ornamental cut flower crop, thereby decline in the industrial value of the crop. Symptomof the disease include as white powdery mat on the upper surface of leaf lamina that graduallyturned pale yellow to brown. Powdery mildew existed in two locations of Wayanad viz.,Ambalavayal and Chulliyode where highest per cent disease severity (PDS) of 50.72 wasobserved at Chulliyode and 47.2 per cent was observed at Ambalavayal during November-December. In Ambalavayal, the disease was non-significant and no correlation existed betweenweather parameters and disease progress. But, in Chulliyode, correlation studies revealed thatit was significant with positive correlation to relative humidity and a reverse relation existedwith temperature and rainfall. The weather data clearly depicts that at a low rainfall of 96 mmand above average relative humidity of 80.27 per cent during November-December was thecongenial factor influencing the disease development. But during summer, decline in relativehumidity (78.37%) and rainfall (63.13 mm) caused a slight reduction in mean per cent diseaseseverity of 49.12 per cent and 33.6 per cent at Chulliyode and Ambalavayal respectively.Morohological and cultural characters of the pathogen depicts presence of two distinct organismviz., Golovinomyces cichoracearum (Erysiphe cichoracearum) and Podosphaera sp. as thecausative organism of the disease. Golovinomyces cichoracearumproduced hyaline, septatemycelia with globose conidia with irregular peripheral end formed in a chain and Podosphaerasp. produced superficial, hyaline, coenocytic mycelium with oval or ellipsoidal, catenate conidiawith dimension ranging from 22.1-30.18 x 13.36-18.08ìm formed in unbranched erectconidiophores.

scholarly journals Efficacy of fungicides and organic oils to control powdery mildew disease of jujube (Ziziphus mauritiana Lam.)

2014 ◽  
Vol 38 (4) ◽  
pp. 659-672 ◽  
Author(s):  
MZ Hoque ◽  
AM Akanda ◽  
MIH Mian ◽  
MKA Bhuiyan
Keyword(s):  
Powdery Mildew ◽  
Foliar Spray ◽  
Severity Index ◽  
Fruit Yield ◽  
Fruit Rot ◽  
Control Treatment ◽  
Mustard Oil ◽  
Ziziphus Mauritiana ◽  
Powdery Mildew Disease ◽  
Indian Jujube

Powdery mildew (Oidium erysiphoides f.sp. ziziphi) is the major disease of Indian jujube (Ziziphus mauritiana) in Bangladesh. An experiment was conducted to test the efficacy of six fungicides, two organic oils, and a detergent against the disease. Tested fungicides were Tilt (Propiconazole) @ 0.05%, Folicur (Hexaconazole) @ 0.1%, Bavistin DF (Carbandazim) @ 0.2%, Dithane M-45 (Mancozeb) @ 0.3%, Thiovit 80 WG (Sulpher) @ 0.3%, and Cupravit (Copper) @ 0.3%, the oils were Mustard oil @ 0.5% and Neem oil 0.5%, and the Detergent (Trix) @ 0.5%. The materials were applied as foliar spray for seven times at an interval of 15 days. All of the fungicides and two oils gave significant decrease in severity of powdery mildew and increased fruit yield of Indian jujube irrespective of varieties, locations and over times. Among the treatments, Folicur, Tilt, Thiovit, and Dithane M-45 sprays were found effective than others. The severity index values on two jujube varieties were 3.89-4.50 at Mowna and 4.00-4.53 at Ishurdi in control treatment. The severity indices were reduced to 1.45-1.96 at Mowna and 1.33-2.07 at Ishurdi due to application of Tilt, Folicur, Thiovit, and Dithane M-45, which gave increase in fruit yield over control by 68.88, 63.69, 63.04, and 54.63% in Apple Kul and 83.25, 77.87, 77.39, and 70.36% in BAU Kul, respectively. Most of the treatments were able to reduce number of spotted fruits. The best effective fungicide was found to be Tilt followed by Folicur and Thiovit in reducing disease severity of powdery mildew as well as other fruit diseases like fruit spot and fruit rot and increase fruit yield of Indian jujube. Therefore, Tilt/Folicur may be recommended for jujube growers to control the powdery mildew disease in commercial orchard. DOI: http://dx.doi.org/10.3329/bjar.v38i4.19032 Bangladesh J. Agril. Res. 38(4): 659-672, December 2013

scholarly journals Effect of Bio-Fertilizer and Foliar Spray of Selenium of Growth, Yield and Quality of Potato Plants

2020 ◽  
pp. 1-7
Author(s):  
Ramadan A. M. Aly ◽  
Khaled Y. Abdel-Halim
Keyword(s):  
Chlorophyll A ◽  
Vegetative Growth ◽  
Field Experiments ◽  
Foliar Spray ◽  
Growth Yield ◽  
High Rate ◽  
Positive Effects ◽  
Potato Plants ◽  
Yield And Quality

Two field experiments were conducted during two seasons of 2017 and 2018 to evaluate the effect of both bio-fertilizer (inoculated or uninoculated) and selenium (Se) spray at 0.5, and 10 ppm on vegetative growth, pigments, yield and quality of potato plants. The results indicated that, vegetative growth characters (number of leaves, plant height, plant fresh weight, plant dry weight, leaf area and leaf pigments (chlorophyll a, chlorophyll b and chlorophyll a and b were significantly increased with Bio-fertilizers (Halex-2, and High rate of Se (10 ppm), in both seasons. Plant yield of tuber, number of tubers/plant, average tuber weight and tuber yield/Fed and (tuber content of starch and protein), generally, seemed to be increased with the Bio-fertilizer (Halex-2) and high rate of Se, in both growing seasons. The interaction between Bio-fertilizer (Halex-2) and Se reflected positive effects on the all studied quantitative and qualitative characters of potato plants.

Incidence of powdery mildew on cucurbit plants in Katsina, Nigeria

2019 ◽  
pp. 05-09
Keyword(s):  
Powdery Mildew ◽  
Low Cost ◽  
Frequency Of Occurrence ◽  
Sphaerotheca Fuliginea ◽  
Causal Organism ◽  
Powdery Mildews ◽  
Powdery Mildew Disease ◽  
Important Disease

The presence study deals with powdery mildews in various cucurbits in Katsina city (Barhim Estate, Kofar Durbi, Kofar Sauri, Kofar Marusa and Low Cost), Nigeria. The finding shows that the areas infested with powdery mildew is one of the important disease of cucurbits. The Sphaerotheca fuliginea was identified to be the causal organism present on all observed cucurbits in the study. Highest frequency of disease was found in Kofar Sauri(79%) fallowed by Kofar Marusa (68%), Kofar Durbi (66%), Barhim Estate (65%) and the lowest frequency of occurrence of disease was found in Low Cost (55%).The intensity of the disease was moderate to severe in general but it was high in many fields, the area-wise variation was also noticed. On vegetables, the highest frequency of occurrence of powdery mildew disease was observed on L. cylindrica (76.4%) followed by C. moschata (60%), C. sativus (59.3%), C. vulgaris (53.9%) and lowest was found on C. melo (44.4%). The highest intensity of disease was found on C. moschata, followed by L. cylindrica, C. sativus, C. vulgaris and C. melo.

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