Abstract
Various insect-pests have been reported with the start of intensification and commercialization in cultivation aonla. Weekly surveys on 4 randomly selected plants of NA-7 cultivar were conducted to study the influence of abiotic factors on population/infestation of sucking insect-pests of Indian gooseberry consecutively for two years. Three peaks in population of aphid on the blossom bud stage were recorded, first in 20th SW (May) with 35.31 and 34.75 aphids/branchlet, second in 24th SW (June) with 28.00 and 27.56 aphids/branchlet and third in 36th SW (September) with 8.81 and 7.44 aphids/branchlet, respectively during both the years. The fluctuating population of nymphs of Aonla bug (M. sp. nr spangbergii) have been recorded throughout the year except from 10th-13th SW (March) during first year and 1st and 10th-13th SW in second year, where no population have been observed. Two activity periods of nymphs of mango mealy bug, D. mangiferae were recorded. The pest was found active with fluctuating population from 1st-13th SW (January-March) and again from 41st-52nd SW (October-December) during both the years. However, in case of mealybug, N. vastator, the infestation of pest occurred from 14th-44th SW (April-October) with peak activity in 22nd SW (May) during first year and 14th-43rd SW (April-October) with peak activity in 40th SW (October) during second year.
Published Version
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