|Title:||小菜蛾寄生小繭蜂之大量繁殖與田間釋放||Other Titles:||Mass Production and Field Liberation of a Larval Parasite (Apanteles Plutellae) of the Diamondback Moth||Authors:||邱瑞珍
|Issue Date:||5-Mar-1974||Publisher:||農業試驗所||Journal Volume:||23||Journal Issue:||1||Start page/Pages:||48-59||Source:||農業研究||Abstract:||
小菜蛾（Plutella xylostella Linn.）為目前本省十字花科蔬菜之首要害蟲，其防治方法係以化學藥劑、蘇力菌與寄生蜂等配合使用，以達綜合防治之目的。本文報導小菜蛾及其幼蟲寄生蜂之大量繁殖與釋放工作。
The diamondback moth, Plutella xyiostella L., is one of the most serious insect pest of the cruciferous vegetable in Taiwan. A demonstration integrated control program of this pest, involving chemical, microbial and biological agents has been conducted in recent years. An improved technique for mass production of the diamondback moth and its larval parasite, Apanteles plutellae is reported in this paper.
Larvae of the diamondback moth were reared in the insectary in plastic trays (52 x 39 x 15.5cm) with fresh vegetable supplied daily. Wooden cages (26 x 36 x 40cm) with potted growing vegetables were used for moth oviposition. In addition, an outdoor 0.05 hectare screened vegetable garden was furnished for host and parasite rearing under natural conditions.
From the insectary rearing, 2nd-and 3rd-instar larvae of the diamondback moth were obtained for Apanteles oviposition. Also, a large number of parasite cocoons were daily collected from the field screen house when the temperature and humidity were suitable for field rearing. Difficulties were encounted when a large number of diamondback moth was reared at one time, because of the effects of weather conditions, virus disease, fresh vegetable supply, etc. For overcoming those difficulties, two species of rice moths, Corcyra cephalonica Sta. and Ephestia cautella Walk. were chosen as alternative hosts for Apanteles mass production.
The field liberation of parasites was carried out on December 9, 1972, March 19-20 and May 30, 1973 at Hsilao, Shihlin and Nantze respectively. Apanteles parasites were released about 2 weeks after Thuricide 9Ots applications. One day before or after, and 2 weeks after the parasite liberations the populations of the host insect and parasite were investigated. Results showed that the parasite liberation was apparentely effective in reducing the density of larvae and pupae of the diamondback moth. And in increasing the percent parasitism by Apanteles plutellae in the above releasing fields by the amounts ranging from 18.26-26.31% ° However, the rate of parasitism depended largely upon the rate of parasite emergence, location of vegetable fields and weather conditions within 2 weeks after parasite release.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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