Bioefficacy of wild plant extract for biological control of insect pests of Bt cotton

Autor:	R. W. Bharud, U. B. Hole, S. M. Gangurde, N. D. Sarode
Rok vydání:	2015
Předmět:	education.field_of_study biology Crop yield Population General Engineering Wilting Ocean Engineering Azadirachta biology.organism_classification Balanites roxburghii Toxicology Crop Agronomy Bt cotton education Hectare
Zdroj:	ASIAN JOURNAL OF BIO SCIENCE. 10:167-170
ISSN:	0976-8343 0973-4899
DOI:	10.15740/has/ajbs/10.2/167-170
Popis:	Wild plant fruit extract such as hinganbet, Balanites roxburghii , ritthaa/soap nut, Sapindus trifoliatus , shikekaaee, Acacia concinna , Neem, Azadirachta indica , Karanj, Pongamia pinnata and vekhand, Acorus calamus L. were evaluated to screen their efficiency for the control of sucking pests of Bt cotton during Kharif 2009 to 2012 at Cotton Improvement Project, Mahatma Phule Krishi Vidyapeeth, Rahuri. All the organic pesticide treatments were superior over untreated control. Among the evaluated organic pesticides the treatment with 5 per cent hingan bet extract @ 2 litre per hectare was observed to be effective in reducing pest population in which aphids, jassids, thrips and whiteflies of 22.68, 8.16, 14.53 and 10.97 per three leaves, respectively, were recorded with the seed cotton yield of 20.77 quintal per hectare. However, this treatment was statistically at par with 5 per cent ritthaa extract @ 2 litre per hectare. The treatment with 5 per cent ritthaa extract recorded aphids, jassids, thrips and whiteflies of 23.16, 9.87, 15.34 and 12.65 per three leaves, respectively, with the seed cotton yield of 20.09 quintal per hectare. The treatment with 5 per cent NSE @ 2 litre per hectare recorded 28.96, 12.61, 17.71 and 15.18 aphids, jassids, thrips and whiteflies per three leaves, respectively, with the seed cotton yield of 12.31 quintal per hectare. The phytotoxicity studies on leaf injury on tips and leaf surface, wilting, vein necrosis, epinasty and hyponasty showed that there was no phytotoxic effect of the evaluated pesticides on cotton crop at the evaluated doses. The counts on natural enemies in the treatments with hinganbet and ritthaa extract were more or less similar to those recorded in untreated control. This clearly indicated that there was no adverse effects on natural enemies due to spraying of hinganbet and ritthhaa extract at evaluated doses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f46b2915df0c664c257bf7a84764e06c https://doi.org/10.15740/has/ajbs/10.2/167-170 Zobrazit plný text záznamu