|Title:||柑橘紅蜘蛛天敵調查及藥劑防治對其安全之檢討||Other Titles:||Studies on Natural Enemies of Citrus Red Mite with Discussion about Their Safety in Chemical Control of Citrus Insects||Authors:||羅幹成
Paul K.C. Lo
Charles Chia-Chu Tao
|Keywords:||柑橘紅蜘蛛;Citrus Red Mite||Issue Date:||Dec-1964||Publisher:||中華農學會||Journal Volume:||新48||Start page/Pages:||35-49||Source:||中華農學會報||Abstract:||
Citrus red mite Panonychus citri (McGreger) is the most severe citrus pest at present, it may be resulted by the frequency application of insecticide to break down the natural balance the citrus mite and its predators. According to present survey, 5 species of insect predators of citrus red mite have been recorded, namely Stethorus sp. (Coccinellidae, Coleop.), Oligota sp. (Staphylinidae, Coleop.), Chrysopa sp. (Chrysopidae, Neurop.) Scolothrips sexmaculatus Perg. (Thripidae, Thysanop.) and Leptothrip sp. (Phloeothripidae, Thysanop.). Among them, Stethorus was the most active. Oligota was inferier due to its high mortality took pupation in soil. Food consumption of Chrysopa was the hugest but if the honey dew on citrus foliage is not sufficient enough to attract female oviposition then its population is decreased. Scolothrips sexmaculata Perg. and Leptothrips were rarely found. To completion one generation of Stethorus took 10-15 and 12 days in average. It was about 3-4 days quicker than its victim in the same environments. Moreover, the reproductive potentiality was superior than its victim, therefore the mass production and the releasing of Stethorus may be utilizable. For protection the above mentioned citrus red mite predators, it has to have a consideration to choice selective insecticide whether ot not be built up citrus red mite population in advance. However, the integrated (or biological and chemical) control is necessarily, at least the spot or skip spray method should be employed to preserve these predators.
|Appears in Collections:||應用動物組|
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