论文部分内容阅读
1994～1996年对双季稻区稻水象甲发生消长和迁飞动态的系统研究表明,稻水象甲的飞行肌和卵巢发育随生活史的季节性变化出现兴衰交替,从而迁入迁出稻田和越冬场所,表现出典型的卵子发生-飞行共轭:春季越冬代成虫从越冬场所迁入早稻田后飞行肌消解而卵巢发育,繁殖形成一代致害种群。夏季一代成虫生殖滞育,飞行肌和脂肪体发达,绝大部分个体迁出早稻田行夏蛰并越冬;少量落入秧田者和早稻收割时散落田内而晚稻插秧时尚未迁离的个体卵巢恢复发育,飞行肌消解而构成二代虫源。秋季二代成虫羽化后生殖滞育,迁飞上山越冬;10月中旬后羽化的个体卵巢和飞行肌均不再发育而滞留田内外越冬。取食高质量食料时,一代夏蛰成虫飞行肌再生,新羽一代成虫则首先发育飞行肌,而后解除生殖滞育。
A systematic study on the dynamics of the growth and migration of rice water weevil from 1994 to 1996 showed that the development of flight muscle and ovary of M. asiatica alternated with the seasonal changes of life history and moved in and out Paddy fields and overwintering places, showing typical egg occurrence - flying conjugation: the overwintering adults in spring migrate into Waseda to fly muscle decomposition and ovary develop and multiply to form a generation of virulent populations. The adults of the first generation of summer reproductive diapause, flight muscle and fat body developed, the vast majority of individuals migrated out of the Waseda line summer sting and wintering; a small amount of fallen into the seedling and early rice scattered in the field when the harvest and late rice transplanting ovaries did not migrate development , Flying muscle digestion and constitute the second generation of insect sources. The second generation of adult fall insects after the emergence of reproductive diapause, migratory uphill overwinter; eclosion of individual ovaries and flying muscle after mid-October no longer develop and stay in the field of winter. When feeding high-quality food, a generation of summer sting fly flying muscle regeneration, the new feather generation of adults first developed flight muscle, and then lifted reproductive diapause.