Indian Journal of Agricultural Research

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Indian Journal of Agricultural Research, volume 40 issue 4 (december 2006) : 282 - 285

ESTIMATION OF AVOIDABLE LOSSES DUE TO PESTS OF GRAPEVINE*

D. Jagdishwar Reddy
1Department of Entomology, College of Agriculture, Rajendranagar, Hyderabad - 500 030, India

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Cite article:- Reddy Jagdishwar D. (2024). ESTIMATION OF AVOIDABLE LOSSES DUE TO PESTS OF GRAPEVINE*. Indian Journal of Agricultural Research. 40(4): 282 - 285. doi: .

ABSTRACT

Estimation of avoidable losses in grapevine due to flea beetle, thrips and grain caterpillar
was studied by imposing the spray schedule in comparison with farmer’s practice. The maximum
protection treatment (T1) consisting of 12 sprayings from 3 DAP (Days After Pruning (October)
to 108 DAP on Thompson Seedless was established to be most effective in reducing the damage
caused by flea beetle, thrips and grain caterpillar with a fruit yield of 25553 kg/ha and high cost
benefit ratio (1:16.80). Whereas the farmer’s practice (T2), where more sprayings were imposed,
recorded 21953 kg/ha fruit yield and cost benefit ratio of 1:10.36. The insecticide residues at
harvest were below detectable level in T1, hence the maximum protection (T1) spray schedule
can be suggested to farmers.

KEYWORDS

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