벼잎벌레(Oulema oryzae) 월동성충의 산란 및 유충발유에 미치는 온도의 영향

Effect of Temperature on the Oviposition, Larval and Pupal Development of Oulema oryzae (Coleoptera: Chrysomelidae)

온도가 벼잎벌레의 산란 및 발육에 미치는 영향을 조사하였다. 조사온도는 15, 20, 23, 25, $28^{\circ}C$로 하여 수행한 결과 발육기간은 $15^{\circ}C$에서 $28^{\circ}C$에서 최고를 이루고 다시 낮아지는 경향을 보였다. 발육기간은 저온보다 고온($28^{\circ}C$)에서 짧은 경향을 보였다. 알발육영점도는 $6.4^{\circ}C$, 총유효적산온도는 75.8일도였다. 이 결과는 $23^{\circ}C$가 벼잎벌레의 산락적온으로 추정되었다.

Effect of temperature on oviposition and developmental period of Oulema oryzae K. on riceplant were investigated. With the given set of temperatures of 15, 20, 23, 25, and 28"C, developmentalperiod from egg to adult emergence was shorten as temperature increased. Average number of eggs perfemale 0. oryzae increased as temperature increased from 15$^{\circ}$C to 23"C, then decreased at 25$^{\circ}$C and 28"C. Based on this result, developmental threshold temperatures for egg was estimated to be 6.4"C. Totaleffective temperatures above the thresolds required for hatching were estimated to be 75.8 degree-daysfor egg. It seemed that the optimum temperature for oviposition of Oulema oryzae on rice plant was 23"C.a oryzae on rice plant was 23"C.quot;C.