稻細蟎之天敵一氈蟎之生活史，捕食能力及殺蟲劑對其毒性測定
Other Title
Studies on the Life History and Predation of Lasioseius and Its Tolerance to Some Pesticides
Start Page
235
End Page
240
Date Issued
1984-12
Date
1984-12
Author(s)
羅幹成
何琦琛
K.C. Lo
C.C. Ho
Abstract
在20、25、30及35℃定溫下，分別以稻細蟎(Steneotarsonernus spinki)及菌食性細蟎(Tarsonenius sp.)之卵飼育稻細蟎之捕食性天敵氈蟎(Lasioseius youcefi)，比較觀察其生活史，捕食量。35℃時氈蟎不能存活，30℃時氈蟎發育鼓快捕食量最多。氈蟎飼以菌食性細蟎卵較飼以稻細蟎卵者發育較快，捕食量較高，繁殖較好。僅以稻蟎卵為食物飼育氈蟎，可能影響其生殖能力。
測試8種殺蟲劑對氈蟎之毒陸，以Hokbal 40% E.C., MIPC 20% E.C.及Fenitrothion 50% E.C.較安全，兼顧封另一種主要天敵扁捕植蟎之毒性，則僅Hokbal 40% E. C.對二者均安全。建議使用Hokbal 40% E.C.防治稻蝨類以保存稻細蟎之主要捕食性天敵蟎。
Lasioseius youcefi (Ascidae), a natural enemy of Steneotarsonemus spinki, was reared at 20, 25, 30 and 35℃ on the eggs of S. spinki and Tarsonemas sp. The life history and food intake were observed. L. youcefi could not survive at 35℃. The development period was shortest and the food intake was highest at 30℃. Shorter developmental period, higher food intake and better propagation were observed on the ascid mites fed with the eggs of Tarsonemus sp. than with the eggs of S. spinki.
Eight commonly used rice pesticides were tested by the leaf-dip residue method in order to determine their toxicity to the ascid mites. Hokbal 40% E. C., MIPC 20% E. C. and Fenitrothion 50% E. C. were found to be less harmful to ascid mites. 1-lowever, Hokbal 40% E. C. is the only pesticide recommended to control rice hopper pests as a selective pesticide, in view of its toxicity to Amblyseius taiwanicus, another important predator of S. spinki.
Subjects
稻作
區域性
期作性
低產
增產
Publisher
臺灣省農業試驗所
Type
book part
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