Studies on the feeding potential and food requirements of some aphidivorous insects
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Date
1967
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Division of Entomology, Agricultural College and Research Institute, Vellayani
Abstract
Studies have been made on the feeding potential and food requirements of the grubs and adults of chilomenes sexmaculata Fabr, and the feeding potential of adults of Scymnus quadrillum Motsch, and Pseudaspidimerus circumflexa and the maggots of the syrphid, Xanthogramma scutellare Fb. The firstinstar grub of C.sexmaculata feeds on an average of 3.48 aphids of Aphis craccivora during its first day and 4.92 aphids during its second day and on a total of 8.98 aphids during the whole instar. The first instar lasts for an average of 2 days and suffers a mortality of 32.5% under laboratory conditions. The second instar grub feeds on a average of 5.48 aphids on its first 5.62 on its second, 5.76 on its third and 5.94 on its fourth day.
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PG
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