scholarly journals A field experiment with nematicide treatment revealed potential sugarcane yield loss caused by plant-parasitic nematodes in Okinawa, Japan

2016 ◽  
Vol 46 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Masanori Kawanobe ◽  
Naoko Miyamaru ◽  
Koichi Yoshida ◽  
Takeshi Kawanaka ◽  
Koki Toyota
Keyword(s):  
Field Experiment ◽  
Yield Loss ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Sugarcane Yield ◽  
Plant Parasitic

scholarly journals Survey of Plant-Parasitic Nematodes in Kansas and Eastern Colorado Wheat Fields

2014 ◽  
Vol 15 (3) ◽  
pp. 112-117 ◽  
Author(s):  
T. C. Todd ◽  
J. A. Appel ◽  
J. Vogel ◽  
N. A. Tisserat
Keyword(s):  
Great Plains ◽  
Yield Loss ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Population Densities ◽  
Economic Thresholds ◽  
Lesion Nematodes ◽  
Maximum Root ◽  
Root Lesion Nematodes ◽  
Plant Parasitic

Observations on the prevalence and abundance of plant-parasitic nematodes were made from soil and root samples collected from 2,640 wheat fields in Kansas and Colorado during 2007-2010. Stunt nematodes (predominately Merlinius brevidens and Quinisulcius acutus), root-lesion nematodes (predominately Pratylenchus neglectus), and pin nematodes (Paratylenchus projectus) were the most commonly encountered taxa. Maximum soil population densities of 6,520 and 1,880 nematodes/100 cm3 soil were observed for pin and stunt nematodes, respectively, while a maximum root population density of 90,309 nematodes/g dry root was observed for root-lesion nematodes. Lower nematode densities were associated with wheat following corn, grain sorghum, or soybean for pin and stunt nematodes, and with wheat following fallow for root-lesion nematodes. Based on the results of this survey, 6% and 8% of wheat acreage in the central Great Plains are estimated to be at risk for significant (>5%) yield loss due to stunt nematodes and root-lesion nematodes, respectively. The number of fields with high population densities of both stunt and root-lesion nematodes was negligible (1%); therefore, the total wheat acreage with nematode populations above provisional economic thresholds is estimated to be ∼13%. Damage relationships with greater accuracy, precision, and relevance are necessary to establish reliable yield loss estimates for this region. 3 June 2014. 11 August 2014.

scholarly journals The ACE Genes in Aphelenchoides Besseyi Isolates and Their Expression Correlation to the Fenamiphos Treatment

2021 ◽  
Author(s):  
Jung-Kai Hsu ◽  
Chia-Wei Weng ◽  
Jeremy J.W. Chen ◽  
Peichen J. Chen
Keyword(s):  
Yield Loss ◽  
Point Mutations ◽  
Acetylcholinesterase Inhibitors ◽  
Ache Inhibitor ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Invertebrate Species ◽  
Great Yield ◽  
Aphelenchoides Besseyi ◽  
Plant Parasitic

Abstract Aphelenchoides besseyi could cause great yield loss on rice and many economically important crops. Acetylcholinesterase inhibitors were commonly used to mitigate plant parasitic nematodes. However, increasing nematicide-resistance has been reported due to the extensive use of these chemicals. The correlation between the AChE-inhibitor (fenamiphos) sensitivities and acetylcholinesterase (ace) genes in two isolates of A. besseyi (designated Rl and HSF) was established. The LD50 of fenamiphos to Rl and HSF were 572.2 ppm and 129.4 ppm, respectively, indicating that two nematode isolates had different sensitivities to fenamiphos. Three ace genes were cloned and sequenced in A. besseyi, and their homology was supported by phylogenic analysis with AChEs protein sequences from various vertebrate and invertebrate species. Molecular docking showed that the affinities of each AChEs to fenamiphos were higher in HSF isolate, indicating that there should be point mutations in Rl isolate AChEs. Treating the two isolates with 100 ppm fenamiphos for 12 h, three ace genes of HSF isolate were down-regulated but were up-regulated in Rl isolate. The results suggest that fenamiphos can transcriptionally modulate the expression of ace genes, as well as the variants in AChEs and increased expression of ace genes might be associated with fenamiphos-insensitivity in Rl isolate.

scholarly journals DISTRIBUTION AND POPULATION DENSITIES OF PLANT-PARASITIC NEMATODES ASSOCIATED WITH GINGER (ZINGIBER OFFICINALE) IN KADUNA STATE, NIGERIA

2020 ◽  
Vol 4 (3) ◽  
pp. 496-504
Author(s):  
Julius Bulus ◽  
Peter Abraham ◽  
Mercy Joshua ◽  
Dauda Elisha Shamaki ◽  
Christopher Tobe Okolo ◽  
...  
Keyword(s):  
Yield Loss ◽  
Zingiber Officinale ◽  
Economic Importance ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Population Densities ◽  
Population Average ◽  
Percentage Similarity ◽  
Important Cash Crop ◽  
Plant Parasitic

Ginger (Zingiber officinale) is an important cash crop in Nigeria. In spite of the economic importance of plant-parasitic nematodes reported on ginger, little or no information is available as regards plant-parasitic nematodes diversity and abundance on ginger in Nigeria. This work was conducted in 2018 to identify plant-parasitic nematodes associated with ginger in Kaduna state and to determine their population densities. Three Local Government Areas (LGA) were visited and between 12 to 16 ginger farms were sampled per LGA. A total of 42 soil samples was collected at a depth of 0 - 30 cm of the plant rhizosphere. Plant-parasitic nematodes were extracted from the soil using modified sieving and decanting method. Identification to genera level was done using identification keys viewing with dissecting microscope at X40 magnification. Nineteen (19) genera of plant-parasitic nematodes were identified, with 12 genera occurring in all LGA(s). Scutellonema (113.33), Meloidogyne (110), and Pratylenchus (93.33) were the most abundant per 100 ml of soil when locations are combined. Plant-parasitic nematodes population average was 870-950 per 100 ml of soil. All locations showed a high percentage similarity of plant-parasitic nematodes diversity and were statistically similar. This high diversity and population abundance can be among the reasons for the low productivity of ginger in Nigeria. It is therefore important to educate farmers on the economic importance of plant-parasitic nematodes on ginger and its management. Further research using the most occurring genera to establish the threshold population densities capable of causing economic yield loss needs to be conducted

scholarly journals Nematode Management in Cole Crops

EDIS ◽  
2021 ◽  
Vol 2021 (1) ◽  
pp. 13
Author(s):  
Z. J. Grabau ◽  
J. W. Noling
Keyword(s):  
Yield Loss ◽  
Cultural Practices ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Fact Sheet ◽  
Nematode Management ◽  
Cole Crops ◽  
Plant Parasitic ◽  
Agricultural Professionals

Many different plant-parasitic nematodes cause yield loss in cabbage, broccoli, collards, and other valuable Florida cole crops. This 13-page fact sheet written by Z. J. Grabau and J. W. Noling and published by the UF/IFAS Entomology and Nematology Department lists common symptoms, explains how to submit samples to a nematology lab such as the UF/IFAS Nematode Assay Lab for diagnosis, and describes key cultural practices to help agricultural professionals spot and manage nematode problems in cole crops.

Effect of Heterodera glycines and soil chemical and biological cultivation factors on the yield of green soybean grown in a glasshouse in Japan

Nematology ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 237-244 ◽  
Author(s):  
Daisuke Ito ◽  
Koki Toyota ◽  
Zhen Guang Li
Keyword(s):  
Negative Correlation ◽  
Yield Loss ◽  
Heterodera Glycines ◽  
Chemical Properties ◽  
Planting Date ◽  
Parasitic Nematodes ◽  
Pratylenchus Penetrans ◽  
Yield Losses ◽  
Plant Parasitic Nematodes ◽  
Plant Parasitic

Yellowing symptoms sometimes cause yield losses in green soybean cultivation. The objective of this study was to estimate the yield loss factors in a glasshouse. The parameters evaluated were plant-parasitic nematodes (Heterodera glycines, Pratylenchus penetrans, Meloidogyne spp.) and soil chemical properties. While the density of H. glycines did not show a negative correlation with yield in the February planting date, it showed a strongly negative correlation in the March planting date. Multiple regression analysis showed that yield was significantly correlated with P. penetrans and nitrate in the February planting, and with H. glycines and K in the March planting. The present study revealed that yield loss was caused by P. penetrans and nitrate in seasons with unsuitable temperatures for H. glycines hatch, and by H. glycines and alleviated by K in seasons with optimum temperatures for H. glycines hatching.

scholarly journals Incidence and Economic Importance of Plant-Parasitic Nematodes on Peanut in Texas

1987 ◽  
Vol 14 (2) ◽  
pp. 94-96 ◽  
Author(s):  
T. A. Wheeler ◽  
J. L. Starr
Keyword(s):  
Yield Loss ◽  
Negative Relationship ◽  
Economic Importance ◽  
Crop Damage ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Root Knot Nematode ◽  
Growing Seasons ◽  
Significant Negative Relationship ◽  
Plant Parasitic

Abstract The distribution of plant-parasitic nematodes in five Texas peanut producing counties was determined during 1985 and 1986 growing seasons. Criconemella, the most frequently detected genus, was present in 83.4% of the samples; evidence of crop damage was not observed. Meloidogyne arenaria was detected in 15.5% of the samples. In microplot tests, there was a significant negative relationship between initial populations of M. arenaria and peanut yields; a linear model estimates a 10% yield loss with initial populations of 44–83 M. arenaria/500 cm3 soil. At least 10% of the survey samples were estimated to have root-knot nematode populations exceeding that necessary for a 10% yield loss. Other parasitic genera found in the survey were Pratylenchus (15.7% of the samples) and Belonolaimus (0.8% of the samples). While pod symptoms of Pratylenchus damage were observed, reliable yield loss estimates can not be made with existing data.

scholarly journals The role of plant parasitic nematodes on productivity reduction of banana and tomato in East Kalimantan, Indonesia

2017 ◽  
Vol 1 (01) ◽  
pp. 40-45 ◽  
Author(s):  
SUYADI SUYADI ◽  
ROSFIANSYAH ROSFIANSYAH
Keyword(s):  
Yield Loss ◽  
Parasitic Nematode ◽  
Plant Parasitic Nematode ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Agricultural Ecosystem ◽  
East Kalimantan ◽  
Major Pest ◽  
Plant Parasitic

Suyadi, Rosfiansyah. 2017. The role of plant parasitic nematodes on productivity reduction of banana and tomato in East Kalimantan, Indonesia. Asian J Agric 1: xxxx. Plant parasitic nematode is one of the most limiting factor of agricultural ecosystem productivity in East Kalimantan, but their occurrence in agricultural field as a crop’s pest generally undistinguished, due to their microscopic size and their existence wrapped in the roots or soil particles. However, plant parasitic nematodes might cause yield loss up to 75%, without showed any disease symptom on crop morphologically. Perennial crop and annual crop under intensive cultivation usually experience high yield loss due to plant parasitic nematodes, if crop protection management was not implemented properly. This research aimed to determine the role of plant parasitic nematodes in reducing crop’s productivity in East Kalimantan, in relation to agricultural practices implemented by farmers. A descriptive research and comparative analyses were implemented to determine the role of plant parasitic nematode on yield reduction of banana and tomato as the indicator of productivity. Based on the field observation related to pest management in East Kalimantan, it was determined that plant parasitic nematode existence was neglected by farmers and no significant effort was implemented to control plant parasitic nematodes population. Therefore, low productivity of agricultural ecosystem in East Kalimantan was reported by Statistical Office, and it was not only caused by soil fertility problems, in some crops it was also the impact of population outbreak of plant parasitic nematodes. The first ranking three genera of plant parasite nematodes observed in East Kalimantan were Meloidogyne, Radhopholus, and Rotylenchulus, respectively. Meloidogyne and Rotylenchulus were major pest on vegetables, and caused yield loss >50% on tomato. While, genus of Radhopholus was the major pest on banana, and caused yield loss >75% on banana.

scholarly journals Fumigant and Non-Fumigant Nematicides Labeled for Agronomic Crops in Florida

EDIS ◽  
2017 ◽  
Vol 2017 (1) ◽  
pp. 3
Author(s):  
Zane Grabau
Keyword(s):  
Yield Loss ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Agronomic Crops ◽  
Chemical Products ◽  
Plant Parasitic

Plant-parasitic nematodes can cause severe yield loss of agronomic crops in Florida. Chemical products for managing plant-parasitic nematodes are called nematicides. This three-page facts heet describes the nematicides registered for use in Florida. Written by Zane Grabau and published by the Department of Entomology and Nematology.­http://edis.ifas.ufl.edu/in1152

scholarly journals Systematic Investigation of Plant-Parasitic Nematodes Associated with Main Subtropical Crops in Guangxi Province, China

Life ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1177
Author(s):  
Yi-Xue Mo ◽  
Ai-Su Mo ◽  
Zhuo-Qiu Qiu ◽  
Bing-Xue Li ◽  
Hai-Yan Wu
Keyword(s):  
High Frequency ◽  
Host Plants ◽  
Yield Loss ◽  
Systematic Investigation ◽  
Parasitic Nematodes ◽  
Plant Parasitic Nematodes ◽  
Guangxi Province ◽  
Large Area ◽  
Main Crop ◽  
Plant Parasitic

Plant parasitic nematodes (PPNs) are a pathogenic group that causes momentous crop yield loss by retarding plant growth and development through plant parasitization. In this study, the distribution of PPNs based on the main crops in Guangxi Province of China was investigated. A total of 425 samples of soil or roots from sugarcane, rice, maize, and soybean were collected in 68 counties, and a total of 48 order/family/genera of PPNs were identified, of which some genera were found in more than one crop. A total of 31 order/family/genera of PPNs were found in rice, among which Hirschmanniella was the most abundant, accounting for 79.23%, followed by Tylenchorhynchus (34.43%). Forty order/family/genera were observed in maize, of which the dominant genera were Pratylenchus and Tylenchorhynchus at 45.14% and 32.64%, respectively. In addition, 30 order/family/genera of PPNs were detected from sugarcane, and the percentages of Tylenchorhynchus and Helicotylenchus were 70.42% and 39.44%, respectively. The main crop of Eastern ecological regions was rice, with a high frequency of Hirschmanniella. The greatest frequency of Pratylenchus was found in the Western eco-region, which had a large area of maize. In the Northern eco-region, rice and maize were popular, with abundant Hirschmanniella and Helicotylenchus. In the Central eco-region, Pratylenchus was detected on the main crop of sugarcane. Hirschmanniella (72.94%) was dominant in clay, and Tylenchorhynchus (54.17%) showed the highest frequency in loam. The distribution of PPNs varied with different altitudes. The diversity of this phenomenon was closely related to host plants. These results could improve understanding of the distribution of PPNs and provide important information for controlling PPNs.

Sign in / Sign up

Export Citation Format

Share Document