黑胸网螱在四川盆地分飞期的划分与预测

<正>自1976年以来在成都、宜宾、乐山、重庆对黑胸网螱分飞作了连续八年生物学观察,认为黑胸网螱分飞期可分为分飞始期、分飞盛期、分飞未期三个阶段。适宜的气温是导致分飞的主要原因,分飞盛期出现早迟与当年各地3月25日前连续40天的积温相关。上述各地的分飞盛期都出现在相同的月、旬内,且所有盛飞日基本在宜宾地区刺槐始花和成都地区的刺槐大量谢花期之间。因此,只要用成都的积温或宜宾和成都的物候就可对成渝地区的分飞盛期进行预测。

DIVISION AND PREDICATION OF NUPTIAL FLIGHT STAGE OF RETICULITERMES CHINENSIS SNYDER IN SICHUAN BASIN

After keeping the nuptial flight of Reticulitermes chinensis Snyder under biological observation for eight years in Chengdu, Yibin, Leshan and Chongqing, it is considered that its nuptial flight may be divided into the start, peak and end stages. It can be seen from analysis of climatic factors that suitable air temperature is important for the nuptial flight. The early or late peak stage is interrelated with the 40 days of continuous accumulated temperature in the regions mentioned above before the 25th of March in the year. As air temperature is the main cause for nuptial flight and Sichuan Basin is a special climatic region, the peak stages of the nuptial flight in those regions occur within the same month and ten days; of the year and all the days of peak flight are mainly between the initial flowering phase of Robinia pseudoacacia L. in Yibin region and the heavy withering phase in chengdu region, therefore, the peak stages of nuptial flight in Chengdu and Chongqing regions can be predicted merely by the accumulated temperature of Chengdu or the phenological phase of Yibin and Chengdu.