نتایج جستجو برای: laodelphax striatellus
تعداد نتایج: 193 فیلتر نتایج به سال:
زنجرک‌های گروه Fulgoromorpha، حشراتی پلیفاژ هستند که از آوندهای آبکش موجود در ریشه، طوقه و ساقه گیاهان علفی و گاهی آوند آبکش برگ‌های گیاهان چوبی تغذیه می‌کنند و در جمعیتهای بالا میتوانند خسارت‌های فراوان و جدی به محصولات کشاورزی وارد نمایند. منطقه گرگان به لحاظ موقعیت جغرافیایی خاص، از اقلیم‌های متنوعی شامل شش نوع اقلیم آب و هوایی خشک، نیمه‌خشک، مدیترانه‌ای، نیمه‌مرطوب، مرطوب و بسیار م...
Rice stripe disease, caused by Rice stripe virus (RSV), is one of the most serious rice diseases in temperate and subtropical regions of the world. Since RSV is not transmissible mechanically, an insect transmission test was the original basis for identification of the viral population and cultivar resistance. A simple, rapid and reliable method is described by which virus-free small brown plan...
Transgenic rice containing insecticidal protein(s) from Bt (Bacillus thuringiensis) effectively control lepidopteran pests under laboratory and field conditions. However, Bt rice has not been widely commercialized. A major concern regarding the deployment of Bt rice is its potential impact on non-target arthropods, including herbivorous insect pests and biological control agents (predators and ...
BACKGROUND The white backed planthopper (WBPH), Sogatella furcifera (Horváth), causes great damage to many crops by direct feeding or transmitting plant viruses. Southern rice black-streaked dwarf virus (SRBSDV), transmitted by WBPH, has become a great threat to rice production in East Asia. METHODOLOGY/PRINCIPAL FINDINGS By de novo transcriptome assembling and massive parallel pyrosequencing...
The parasitoid complex associated with Monochamus galloprovincialis (Olivier), vector of the pine wood nematode, is discussed. Four species of the family Braconidae and one Ichneumonidae were found associated with Monochamus galloprovincialis in Portugal, namely Atanycolus denigrator (Linnaeus), Atanycolus ivanowi (Kokujev), Cyanopterus flavator (Fabricius), Doryctes striatellus (Nees) (Braconi...
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