[Effects of high temperature on laboratory Trichogramma ostriniae population].
In this paper, the life tables of laboratory Trichogramma ostriniae population reared on Corcyra cephalonica eggs at 26 degrees C, 29 degrees C, 32 degrees C and 35 degrees C were constructed, and the effects of high temperature on the development and reproduction of this population were analyzed. The results showed that high temperature (32 degrees C to approximately 35 degreees C) greatly affected the development of T. ostriniae. The egg-larva survival rate was 94.2% at 26 degrees C and 88.6% at 29 degrees C, and decreased to 80.1% at 32 degrees C and 53.2% at 35 degrees C. The pupa survival rate also descended with the raise of temperature. The egg load and the body- and egg sizes of newly emerged female wasps were negatively responded to temperature. 12 h-old adult female had an egg load of 37.9, which was decreased with the raise of temperature, and about 29.6, 21.6 and 13.7 mature eggs were found at 29 degrees C, 32 degrees C and 35 degrees C, respectively. All females could complete their normal copulation and oviposition at 26 degrees C and 29 degrees C, but about 6.7% and 60% females could not reproduce at 32 degrees C and 35 degrees C, respectively.
Chen
Kewei
K
Department of Entomology, South China Agricultural University, Guangzhou 510642, China. chenkewei@scau.edu.cn
Zhou
Jing
J
Gong
Jing
J
He
Yurong
Y
Huang
Shoushan
S
D000818:Animals; D006358:Hot Temperature; D010572:Pest Control, Biological; D011156:Population Density; D014863:Wasps / Q000254:growth & development / Q000502:physiology*