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Artificial diet for massproduction of Mallada basalis (Walker) for control agricultural pests in screen houses

Lo, Paul Kang-Chen, Lee, Wen-Tai, Lu, Chiu-Tung, Yu, Jih-Zu
Acta horticulturae 2002 no.578 pp. 201-205
Tetranychidae, cannibalism, Mallada, artificial diets, larvae, eggs, paper, Corcyra cephalonica, food availability, lacewings, mass rearing, biological control, temperature, leafminers, Aphis glycines, muskmelons, females, adults, Aleyrodidae
A prototypical machine with control of temperature, pressure and fluid level was set up to make microcapsulated artificial diets for mass rearing of Mallada basalis (Walker). Microcapsules about 396±48μm in diameter and 10μm in thickness were produced with 90% success. When M. basalis larvae were reared with the microcapsulated artificial diets modified from Hassan and Hagen’s formula, 90% of individuals reached the adult stage in 20.7 days. And the females deposited 348.5 eggs on average. The results were comparable with those from rearing with eggs of Corcyra cephalonica or Aphis glycines. The microcapsulated artificial diet developed in this work seems promising for mass rearing of M. basalis. In the meantime, an improved, simplified, and labour-saving technique for group-rearing larvae of green lacewing, M. basalis was developed. Using corrugated strip paper rolls and scratched polystyrofoam powder as shelter and debris decreased the larval cannibalism and produced 28% and 14% more adults than control, respectively. An evenly distributed food supply increased the rate of adult emergence 9%. The method including all these factors increased by 90% in total the lacewing larvae as adults. Successful biological control of spider mites, whiteflies, leafminers, thrips, and aphids using the larvae of green lacewing was achieved with muskmelon in screen houses.