نتایج جستجو برای: empoasca decedens

تعداد نتایج: 219  

2015
Houston Wilson Albie F. Miles Kent M. Daane Miguel A. Altieri S. Kaan Kurtural

This study evaluated how the proportional area of natural habitat surrounding a vineyard (i.e. landscape diversity) worked in conjunction with crop vigor, cultivar and rootstock selection to influence biological control of the western grape leafhopper (Erythroneura elegantula Osborn). The key natural enemies of E. elegantula are Anagrus erythroneurae S. Trjapitzin & Chiappini and A. daanei Tria...

Journal: :The Journal of Agriculture of the University of Puerto Rico 1969

ژورنال: :آفات و بیماریهای گیاهی 0
روشنک قربانی مرکز تحقیقات کشاورزی و منابع طبیعی استان لرستان بیژن حاتمی دانشکده کشاورزی دانشگاه صنعتی اصفهان سید کریم موسوی مرکز تحقیقات کشاورزی و منابع طبیعی استان لرستان سعید نظری مرکز تحقیقات کشاورزی و منابع طبیعی استان لرستان

به منظور بررسی اثر عوامل محیطی بر گیاه چغندرقند و تأثیر آن بر تغییرات جمعیت زنجرک چغندرقند empoasca decipiens و تریپس thrips tabaci اثر سه سطح آبیاری (آبیاری پس از 70، 105 و 140 میلی متر تبخیر از تشت تبخیر کلاس a) و سه سطح کود نیتروژن (100، 150 و 200 کیلوگرم نیتروژن خالص در هکتار) به صورت کرت های خرد شده در قالب طرح بلوک های کامل تصادفی با 4 تکرار ارزیابی گردید. نتایج نشان داد که تغییر درصد رطو...

Journal: :journal of agricultural science and technology 2009
b. naseri y. fathipour a. a. talebi

the population density and spatial distribution pattern of empoasca decipiens paoli were etermined in tehran area, iran, during 2004-2005 on four species of common bean phaseolus vulgaris (l.) var. talash, lima bean p. lunatus (l.) savi ex hassk. var. sadaf, rice bean p. calcaratus roxb. var. goli and cowpea vigna sinensis (l.) var. parastoo. the higher and lower mean population densities of e....

Journal: :Journal of economic entomology 2008
Michael J Costello

This study looked at regulated deficit irrigation (RDI) on leafhoppers in the genus Erythroneura (Erythroneura elegantula Osborn, or western grape leafhopper, and Erythroneura variabilis Beamer) (Hemiptera: Cicadellidae), which are serious pests of cultivated grape (Vitis vinifera L.) in California. RDI is an irrigation strategy that reduces irrigation during a critical point in the phenology o...

Journal: :Journal of entomology and zoology studies 2022

In recent years, a change in the spatiotemporal profile of leafhopper populations has been observed, resulting persistent infestations cotton parcels throughout crop cycle. The need to investigate various causes this led present study, which aimed at identifying leafhoppers found on Ivorian basin. Collections were made 12 localities identification these samples revealed existence least three sp...

Journal: :The Journal of Agriculture of the University of Puerto Rico 1969

Journal: :The Journal of Agriculture of the University of Puerto Rico 1975

2012
M. Srinivasa Rao C.A. Rama Rao K. Srinivas G. Pratibha S.M. Vidya Sekhar G. Sree Vani B. Venkateswarlu

Intercropping is one of the important cultural practices in pest management and is based on the principle of reducing insect pests by increasing the diversity of an ecosystem. On-farm experiments were conducted in villages of semi-arid tropical (SAT) India to identify the appropriate combination of castor (Ricinus communis L.) (Malpighiales: Euphorbiaceae) and intercropping in relation to pest ...

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