Cotton varieties that are high yielding and resistant to pests required improve production productivity capitalize on the crop’s enormous potential its critical role in Ethiopia’s expanding textile industry. Lack of improved cotton technology has forced farmers recycle local for ages which have become very susceptible major causes low quality country. Among pests, bollworms (Helicoverpa armiger...

This investigation was aimed to study the management of bollworms using different integrated pest management strategies in cotton. Highest infestation in bolls at harvest was recorded in module-5 and lowest was recorded in module-2. Net returns were highest in module-5, which also recorded maximum cost-benefit ratio. Low net returns and cost-benefit ratio were recorded in module-3. Eventhough, ...

Research was conducted to quantify the development of the corn earworm (= bollworm), Helicoverpa zea (Boddie), on two different transgenic cotton cultivars (DP 50B and NuCOTN 33B) that contained different levels of the Cry1Ac endotoxin from the soil bacterium, Bacillus thuringiensis Berliner. Using a field cage, an inverse relationship between the amount of Cry1Ac among cultivars versus the wei...

The strains of BT bacterium produce approximately 200 different toxins known as BT-Toxins which are harmful for insects most commonly against cotton bollworms(lepidopteran), butterflies, flies, and moths. So, scientist inserted the gene Bacillus thuringiensis was lepidopteran into crop so that toxin kill pest make resistant. we can get good yield by using simple concept rational plant populatio...

Environ. EntoIDo!. 7: 633-635 (1978) Cold acclimation and cold tolerance were studied in laboratory-reared diapausing pink bollworms, Pectinophora gossypiella (Saunders), conditioned at 5°, 10°, and 15° C for 2,4, and 8 wk. Larval mortality, abnormal pupation and total mortality from 2-h exposure to sub-zero temperatures increased similarly as the temperature decreased from _6° to -15° C. Expos...