High precipitation with increase in moisture (68% to 75%) along with a decrease in hotness ( 3 to 5°C less than usual ) all the while June, July, and August months favor the emergence of silver grub beetles, allure egg laying that in turn developed in severe sugarcane clump damage by white grubs in July, August and September months. Seasonal occurrence of white grub in sugarcane increasing areas in Andhra Pradesh state presented that damage of sugarcane clumps caused by silvery grubs infestation was considerably high in march ratoon distinguished to February ratoon crop; January plant crop and low in January organism belonging to the vegetable kingdom plant crop. Grub damage recorded extreme in 4 months age sugarcane ratoon crop and low in 6 months and 7 months age sugarcane plant crop. Field productiveness of entomopathogenic nematode and entomopathogenic fungus in the management of silvery grub, Holotrichia consanguinea in sugarcane was investigated and advanced biocontrol in white grub native areas all along 2017-18 to 2019-20. Entomopathogenic nematode (Heterorhabditis indica NBAII-H38), entomopathogenic fungi (Metarhizium anisopliae (NBAIR Ma4 )along with a synthetic Chlorantraniliprole were evaluated through soil application. The results designated that Heterorhabditis indica NBAII-H38 (12 kg a.i./ha) soil application two opportunities at monthly break resulted in taller reduction of silver grub damage. Metarhizium anisopliae NBAIR Ma4 (2.5 kg a.i./ha) treated plots caused bigger percentage decline of white grub than chlorantraniliprole situation. Entomopathogenic nematode, Heterorhabditis indica and entomopathogenic fungus, Metarhizium anisopliae were erect effective than the insecticidal use in the management of sugarcane white grub. Cost benefit of biocontrol powers, Metarhizium anisopliae and H. indica was proved taller insecticidal application.
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https://journalijecc.com/index.php/IJECC/article/view/2290
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