| Summary: | 碩士 === 國立中興大學 === 昆蟲學系 === 83 === efficeint of dispersion, Lloyd's mean crowding index 及Taylor
power law等學說評估薊馬於田間之空間分布，結果無論使用何種指數，
均顯示唐菖蒲薊馬具有聚集分布之傾向。The development of Thrips
simplex were observed at 4 different temperature:15,20,25 and
30℃.The results indicated that the developmental duration of
eggs, larvae, prepupae and pupae decrease as the temperature
increases.The minimun averagevelopmental durtion at 30℃ forthe
stages were 3.3,1.4,2.4 anddays, respectively. The development
rate(Y) of each stage is proportional to the temperature(X).The
low development threshold and the thermal summation for each
stage were 10.0℃,67.6DD,12.5℃,24.8DD,9.4℃,47.6DD,11.7℃,19.2
DD,8.1℃,46.5DD.Studies of egg hatching rates and motality of
developmental period found thate hatching percentage at 15℃
was minimum with the average of 57.0﹪. The mortality at 15℃
for the stages of 1st larva(7.8﹪), 2nd larva(11.1﹪),
prepupa(17.8﹪) and pupa(34.4﹪) were the highest among the 4
different temperatures. The result showed that the temperature
15℃ was the most unsuitable for Thrips simplex development
among the 4 temperature. The pre-oviposition and oviposition
under different temperatures of female which takes
parthenogenesis or bisexual reproduction decreases as
temperature incereaes. While the minimum pre-oviposition and
oviposion period of virgin female at 30℃ were 2.0 and 15.0
days, the minimum pre-oviposition period and oviposition period
of mated remale were 2.0and 14.5 days.The daily egg production
increases as the temperature increases.There were no
significantly differences between the eggs produced by a virgin
female and a mated female at 15,20,25 and 30℃. The longevities
of a virgin female and a mated female decrease as the
temperature increases.The longevities(Y) of adults(virgin and
mated) and temperature(X) were negative linear relationships.
|
|---|
