Biology and predatory potential of indigenous green lacewing Chrysopa sp. (Neuroptera, Chrysopidae) on black bean and green Peach aphids of vegetables
2002
Rendon, V.Y. | Fajardo, A.A. (Department of Agriculture, Bangcud, Malabalay City, Bukidnon (Philippines). Regional Crop Protection Center)
Collection of indigenous green lacewing (Chrysopa sp.) were undertaken in nearby vegetables and corn areas. Collected specimens were cultured in the laboratory using improvised plastic containers, plastic trays, plastic cups, fine brush, cotton and fine nets. Lacewing larvae were feed with live black bean and green peach aphids and supplemented with fresh Sitotroga cerealella eggs. While the adult lacewings were fed with homemade artificial diet composed of honey sugar, brewer yeast, egg yolk, distilled water, fresh milk and corn grit. The green lacewing (Chrysopa sp.) underwent four stages of development. The egg stage took 4.0 +- 0.7 days, larval period 13.7 +- 2.5 days, 10.4 +- 0.6 days for the pupal period, 7.5 +- 1.9 and 15.6 +- 2.8 days for female adult. The total developmental period from egg to adult was 35.6 +- 5.7 days for male and 43.8 +- 6.6 days for female at 28 +- 2.5 deg C and 66 +- 0.6% relative humidity. One female adult lacewing can produce an average of 47.0 +- 9 individual eggs with a corresponding viability of 57-81%. One lacewing larva (2nd to 4th instar) consumed an average of 50.15 black bean aphids and 51.6 green peach aphids. Result showed the potential of indigenous green lacewing as predator of black bean and green peach aphids, which may lead to sustainable aphid control in vegetables
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