论文部分内容阅读
一、发生规律1.发生世代和生活史:中华稻蝗(Oxya chinensisThunb)在黄淮地区一年发生一个世代,以卵在土壤里越冬。翌年5月上、中旬开始孵化,下旬为孵化盛期,6月上旬孵化末期;蝗蝻有6个龄期, 少数7龄,也有5龄羽化为成虫的。在25～30℃的条件下,每个龄期10～12天,最长14天。最短4天;7月底8月初羽化为成虫,8月中、下旬交尾盛期,9月中、下旬产卵盛期,10月底至11月初为成虫死亡期。蝻期65天左右,成虫期95天左右,卵期(包括越冬期)200天左右。2.生活习性:
First, the occurrence of law 1. Generations and life history: Oxya chinensisThunb (Oxya chinensisThunb) occurred in Huanghuai area a generation a year, with eggs in the winter soil. The following year in May, the beginning of mid-incubation, the late incubation period, early June early incubation period; locusts have 6 instars, a few 7-year-old, there are 5 instar adult into. In the 25 ~ 30 ℃ conditions, each age 10 ~ 12 days, up to 14 days. The shortest 4 days; end of July and early August eclosion into adults, mid August and late mating end of September, mid-late spawning peak, the end of October to early November as the adult dead. About 65 days, about 95 days adult stage, egg stage (including wintering period) about 200 days. 2. Habits: