【摘要】 2005年7月初至9月底,在扬州市邗江区通过田间观察、罩笼试验以及卵巢解剖,初步研究灰飞虱Laodelphax striatellus(Fallén)的起飞行为及其与长翅型密度、天气条件、光照强度、卵巢发育等因素的关系。发现灰飞虱的起飞时段多在日落之后,起飞存在一定的密度阈值和最适光照强度范围,而且在一定程度上表现出"卵子发生—飞行共轭"效应。更多还原

【Abstract】 The takeoff behavior of Laodelphax striatellus(Fallén) and its ralation to factors like the density of macropterous form, wheather, intensity of light and ovarian development were studied by means of field observation, cage experiment and ovary dissection in Hanjiang borough of Yangzhou city from the early July to the late september on 2005. The results show that Laodelphax striatellus(Fallén)are mostly take off after the sunset, and there are a certain threshold density and a optimum lux range for the takeoff. It also shows the oogenesis-flight syndrome to a certain extent.更多还原