Results 171 to 180 of about 2,299 (209)
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Sequential sampling: planthoppers in rice
Crop Protection, 1986Abstract A sequential sampling plan was developed for the brown planthopper, Nilaparvata lugens Stal, and the whitebacked planthopper, Sogatella furcifera Horvath in rice. The plan was tested in several different areas in the Philippines and compared with a more intensive sampling technique.
M. Shepard +3 more
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Genetic and biochemical mechanisms of rice resistance to planthopper
Plant Cell Reports, 2016This article presents a comprehensive review on the genetic and biochemical mechanisms governing rice-planthopper interactions, aiming to contribute substantial planthopper control and facilitate breeding for resistance to planthoppers in rice. The rice planthopper is the most destructive pest of rice and a substantial threat to rice production.
Yang, Ling, Zhang, Weilin
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The ROI of Rice Planthopper by image processing
2017 International Conference on Applied System Innovation (ICASI), 2017Rice Planthopper (RPH) infestation in paddy field is a serious disaster in Asia every year. Finding RPHs based on image processing is an important thing before RPHs growth. We propose a region of interest (ROI) method to detect RPHs clearly. First, get rectangle ROI in HSV space and do color analysis. By using decision tree algorithm, classify analytic
Tsung-Han Tsai +2 more
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Preference Assessment of White-backed Planthopper Feeding on Rice
Journal of Visualized Experiments, 2020Exploiting insect-resistant rice germplasm resources and related genes is the primary need for breeding insect-resistant varieties, but the accuracy of the identification of insect-resistant phenotypes of rice is a major difficulty. It is urgent to develop a new method or improve existing methods to screen rice for insect resistance.
Lei, Zhang, Chao, Wu, Yutao, Xiao
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Biosystematics of rice brown planthopper and rice green leafhoppers
Proceedings: Animal Sciences, 1987The Brown planthopper,Nilaparvata lugens (Stal) is causing serious damage to rice cultivation in tropical countries of Asia for the last 10–15 years. Green leafhoppers,Nephotettix spp. are also assuming serious proportions in different parts. This has been attributed to improved rice production technology, especially with the introduction of high ...
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Mechanisms of Rice Planthopper Resistance to Insecticides
2014History of insecticidal control of rice planthoppers in Asia and associated resistance development is summarized. Rice planthoppers have developed resistance against all the insecticides that were commonly used. Experiences of past 30 years of chemical control of the rice planthoppers in many parts of Asia confirm that the use of any kind of ...
Zewen Liu +5 more
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Prediction of rice brown planthoppers based on system dynamics
2015 12th International Conference on Fuzzy Systems and Knowledge Discovery (FSKD), 2015Rice brown planthoppers are the main pest of Chinese rice production, and belong to the long distance migratory pest. The descriptive model of a rice brown planthopper has complex features, which are dynamic, continuous, nonlinear, multi-variable, multi-feedback, and so on.
Qingren Wang +3 more
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Ultrastructure of sensory receptors on the labium of the rice brown planthopper
Cell and Tissue Research, 1983The ultrastructure of the sensory receptors located on the labium of the rice brown planthopper is described; possible functions of individual receptors are suggested on morphological grounds. Uniporous chemosensilla which may or may not possess a mechanoreceptive dendrite, domed multiporous chemosensilla, and mechanoreceptive pegs are present on the ...
S, Foster, L J, Goodman, J G, Duckett
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An intelligent method for extraction of shape contour of rice planthoppers
Journal of Intelligent & Fuzzy Systems, 2016Diagnosis of rice planthopper pests based on imaging technology is an efficient means to develop intelligent agriculture. Effective contour automation extraction is an important pretreatment technology at the early stage for identifying and classifying rice planthoppers.
Hongwei Yue +4 more
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Ecology and control of rice planthoppers in Fiji
Bulletin of Entomological Research, 1963Observations were made in Fiji on the ecology and control of two Delphacid planthoppers on rice, Sogatella furcifera (Horv.) and Nilaparvata lugens (Stål), the latter species having apparently been responsible for a devastating outbreak in 1959. The studies covered three rice seasons, 1961, 1962, and 1963, most of the research being done at Koronivia ...
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