DIFFERENT INSECTICIDE RATES FOR CONTROL OF BOLLWORM ON VIRGINIA COTTON, 1999.
نویسندگان
چکیده
منابع مشابه
Life table parameters of the cotton bollworm, Helicoverpa armigera (Lep.: Noctuidae) on different soybean cultivars
تأثیر 13 رقم سویا (356، M4، M7، M9، Clark، Sahar، JK، BP، Williams، L17، Zane، Gorgan3 و DPX) روی پارامترهای جدول زندگی کرم غوزه‌ی پنبه، Helicoverpa armigera (Hübner)، در دمای 1 ± 25 درجه‌ی سلسیوس، رطوبت نسبی 5 ± 65 درصد و دوره‌ی نوری 16 ساعت روشنایی و 8 ساعت تاریکی تعیین شد. نرخ بقاء (lx) افراد در زمان ورود جمعیت هم‌سن اولیه به مرحله‌ی حشره‌ی کامل روی ارقام فوق به‌ترتیب 87/0، 83/0، 96/0، 96/0،...
متن کاملDevelopment of a novel‐type transgenic cotton plant for control of cotton bollworm
The transgenic Bt cotton plant has been widely planted throughout the world for the control of cotton budworm Helicoverpa armigera (Hubner). However, a shift towards insect tolerance of Bt cotton is now apparent. In this study, the gene encoding neuropeptide F (NPF) was cloned from cotton budworm H. armigera, an important agricultural pest. The npf gene produces two splicing mRNA variants-npf1 ...
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1. Changes in the frequency of Cry1Ac resistance genes and shifts in tolerance of cotton bollworm, Helicoverpa armigera , to the Cry1Ac toxin were assessed using bioassays of F 1 and F 2 offspring of isofemale lines from Anci County of Hebei Province (a multiple-crop system including corn, soybean, peanut, and Bt cotton) and Xiajin County of Shandong Province (an intensive Bt cotton planting ar...
متن کاملThe Halo Effect: Suppression of Pink Bollworm on Non-Bt Cotton by Bt Cotton in China
In some previously reported cases, transgenic crops producing insecticidal proteins from Bacillus thuringiensis (Bt) have suppressed insect pests not only in fields planted with such crops, but also regionally on host plants that do not produce Bt toxins. Here we used 16 years of field data to determine if Bt cotton caused this "halo effect" against pink bollworm (Pectinophora gossypiella) in s...
متن کاملDeconstructing Indian cotton: weather, yields, and suicides
Background: Cotton with coevolving pests has been grown in India more than 5000 years. Hybrid cotton was introduced in the 1970s with increases in fertilizer and in insecticide use against pink bollworm that caused outbreaks of bollworm. Hybrid Bt cotton, introduced in 2002 to control bollworm and other lepidopteran pests, is grown on more than 90 % of the cotton area. Despite initial declines,...
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ژورنال
عنوان ژورنال: Arthropod Management Tests
سال: 2000
ISSN: 2155-9856
DOI: 10.1093/amt/25.1.f91