Articles
SEASONAL INCIDENCE OF INSECT PESTS ON GRAPEVINE AND ITS CORRELATION WITH WEATHER PARAMETERS
Article number
785_39
Pages
313 – 320
Language
English
Abstract
Survey of insect pests at National Research Center for Grape, Pune during April 2004–March 2005 at weekly interval revealed that fleabeetle population was observed immediately after both foundation and fruit pruning.
Highest population of 5.8 fleabeetle/vine was observed during first week of November, which coincided with bud sprouting.
Thrips population was observed throughout the year with an average peak of 8–10/shoot of vine in November and December months, which coincided the flowering period.
Similarly jassids population was observed round the year with highest of 6.4/shoot during first week of the December.
Mealybug population was distributed sporadically and the highest population of an 5–6 colonies/vine during the last week of February to the last week of March which coincided with the fruiting and harvesting season.
Mite population occurred mainly during winter months, i.e., second fortnight of December to second fortnight of February with average of 5–6 mites/shoot/vine.
Correlation studies with weather parameters and insect incidence revealed that rainfall was significantly negatively correlated with population of sucking insects like thrips and jassids (-0.52** and -0.42**, respectively). Mealybug population was negatively correlated with both maximum (-0.47**) and minimum humidity (-0.50**).
Highest population of 5.8 fleabeetle/vine was observed during first week of November, which coincided with bud sprouting.
Thrips population was observed throughout the year with an average peak of 8–10/shoot of vine in November and December months, which coincided the flowering period.
Similarly jassids population was observed round the year with highest of 6.4/shoot during first week of the December.
Mealybug population was distributed sporadically and the highest population of an 5–6 colonies/vine during the last week of February to the last week of March which coincided with the fruiting and harvesting season.
Mite population occurred mainly during winter months, i.e., second fortnight of December to second fortnight of February with average of 5–6 mites/shoot/vine.
Correlation studies with weather parameters and insect incidence revealed that rainfall was significantly negatively correlated with population of sucking insects like thrips and jassids (-0.52** and -0.42**, respectively). Mealybug population was negatively correlated with both maximum (-0.47**) and minimum humidity (-0.50**).
Authors
N.S. Kulkarni, S.D. Sawant, P.G. Adsule
Keywords
correlation, grape, insect pests, seasonal incidence, vineyard and weather parameters
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