新疆荒漠绿洲生态区稻水象甲主要生物学特性及发生规律研究

为明确稻水象甲主要生物学特性及发生规律,探索稻水象甲暴发的原因,为新疆荒漠绿洲生态区稻水象甲的防控提供依据,调查其越冬场所、寄主植物、不同生境中的种群消长动态、年生活史、发生与环境的关系等。稻水象甲越冬成虫于4月上旬末开始活动,4月中旬在杂草、小麦等旱地作物上取食,5月中、下旬随水稻移栽迁入稻田,之后进入产卵期;一代成虫羽化始期为7月中旬,自8月上旬起,一代成虫又开始向其越冬场所附近的杂草丛转移,逐渐入土越冬。稻水象甲在新疆荒漠绿洲生态区一年发生一代,以滞育成虫在土表和浅土层中越冬,越冬的主要场所为稻田附近的林带和田埂。

Biological characteristics and occurrence regulation of rice water weevil (Lissorhoptrus oryzophilus Kuschel) in desert oasis ecological zone of Xinjiang

The major biological characteristics and occurrence regulation of rice water weevil, Lissorhoptrus oryzophilus Kuschel, were surveyed, and reasons for the outbreak of L.oryzophilus were explored in order to provide evidence for controlling L.oryzophilus in desert oasis ecological zone of Xinjiang. We surveyed its overwintering sites, host plant species, population dynamics in different habitats, life history, relationship with the environment and so on. Overwintering L.oryzophilus began unearthed at the end of the early April, then gradually feed on the weeds, wheat and other dryland crops in mid-April. A large number of adults migrated from dryland to paddy fields in mid to late May and began to oviposit in late May. The first generation adults emerged in mid-July. Since the early August, L.oryzophilus began to transfer to the weed fields, for overwintering. L.oryzophilus has one generation a year in desert oasis ecological zone of Xinjiang, and overwinter as diapause adults on the soil surface or in shallow soil. The main overwintering sites were forest and ridge nearby the rice fields.