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Effect of Temperature on Development and Reproduction of the Rice Armyworm, Pseudaietia separata Walker (Lepidoptera: Noctuidae)  

고해랑 (충북대학교 농과대학 농생물학과)
백현화 (충북대학교 농과대학 농생물학과)
김길화 (충북대학교 농과대학 농생물학과)
Publication Information
Korean journal of applied entomology / v.42, no.1, 2003 , pp. 53-56 More about this Journal
Abstract
Development and reproduction of the rice armyworm, Pseudaletia separata Walker, were investigated under different temperatures (13, 15, 18, 20, 25, 30, and 33$^{\circ}C$ ). It took 80.6 days to grow from egg to pre-adult at 15$^{\circ}C$, and 27.3 days at 30$^{\circ}C$ (3.0 times shorter growth period compared with that at 30$^{\circ}C$ ). The range of developmental temperature of rice armywom was 15-30$^{\circ}C$. Survival rate from hatched larva to pre-adult was the highest as 70.6% at 25$^{\circ}C$. Pre-oviposition period and the adult longevity were 4.2 and 12.3 days at 15$^{\circ}C$, and 2.9 and 8.0 days at 30$^{\circ}C$, respectively. The highest average fecundity per female was 816.6 at 25$^{\circ}C$. The net reproductive rate (R$\_$o/) and intrinsic rate of natural increase (r$\_$m/) were the highest at 25$^{\circ}C$ as 913.0 and 0.175, respectively. As a result, it was considered that optimum of temperature for P. separata growth was = 25.0$^{\circ}C$.
Keywords
Rice armyworm; Pseudaletia separate; Survival rate; Intrinsic rate of natural increase;
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