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Studies on storability of indigenous materials and their utilization on okra sucking pests

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Title Studies on storability of indigenous materials and their utilization on okra sucking pests
 
Creator D.N.Dhanalakshmi
 
Contributor C.P.Mallapur
 
Subject Agricultural Entamology
 
Description Investigations were carried out on the influence of storage period of botanical extracts
on their efficacy against sucking pests of okra both under laboratory and field conditions.
Investigations were also made on the efficacy of indigenous materials and new molecules
against pests of okra under field conditions at Main Agricultural Research Station, Dharwad
during kharif 2005-06.
Laboratory studies revealed that fresh NSKE (5%), GCK (0.5%) and 1 day old GCK
were the effective treatments causing 90 per cent mortality of both aphids and leafhoppers at
7 DAT. The next best treatments included 1 day old NSKE, 2 and 7 days old GCK and
NSKE. Field studies revealed that fresh GCK (0.5%) was the effective treatment in reducing
aphids (66.24%), leafhopper (70.95%) and thrips (77.79%) population with the highest good
fruit yield (35.89 q/ha). The next best treatments included 2 days old GCK, fresh and 2 days
old NSKE. Further, the stored botanical extracts were found safe to natural enemies.
Among different indigenous materials evaluated, NSKE (5%) + GCK (0.5%) + CU
(5%) combination treatment was comparable to that of oxydemeton methyl in reducing
aphids, leafhoppers and thrips population. The highest good fruit yield was obtained in NSKE
+ GCK + CU (41.55 q/ha). The higher IBC ratio was recorded in all the effective indigenous
materials and the indigenous materials were also found safe to natural enemies.
Among different new molecules tested, imidacloprid and acetamiprid were the
effective molecules against aphids and leafhoppers (>90% reduction). On the contrary,
spinosad was found effective against thrips (93.85% reduction). However, the least fruit borer
damage with highest good fruit yield was recorded in emamectin benzoate (7.82% and 47.02
q/ha) and spinosad (9.19% and 45.94 q/ha) with higher IBC ratio. Emamectin benzoate,
spinosad and acetamiprid were found safe to natural enemies.
 
Date 2016-09-14T10:27:41Z
2016-09-14T10:27:41Z
2006
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/76570
 
Format application/pdf
 
Publisher UAS, Dharwad