以物候预测害虫,是通过一系列自然现象的系统观测、记载,找出某些自然现象与害虫发生期的相互关系,从而以这种自然现象的出现作为指标,进行害虫发生期预测。害虫的发生要有一定的自然条件,而这一自然条件,受到影响的还有其他动植物。例如粘虫孵化,要有一定的气温和湿度,一旦条件具备,它便破壳而出。这样的温湿度同样也满足了泡桐开花的要求。通过长期的观察,我们发现吴兴地区泡桐开花与粘虫孵化有一定的相关性,因此,泡桐开花可作为粘虫孵化的预报。同时,还发现苦栋盛展叶,粘虫开始咬麦叶,可把苦栋盛展叶作为粘虫的防治警报。由此可见,一般情况下物候能够及时地、综合地 Prediction of pests by phenology, through a series of natural phenomena observed and recorded, to identify the relationship between the occurrence of certain natural phenomena and the occurrence of pests, so that the occurrence of this natural phenomenon as an indicator for pest occurrence prediction. The occurrence of pests must have some natural conditions, and this natural conditions, affected by other animals and plants. For example, armyworms hatch, to have a certain temperature and humidity, once the conditions are available, it will break the shell out. This temperature and humidity also meet the Paulownia flowering requirements. Through long-term observation, we found that the flowering of paulownia in WuXing region has some correlation with the hatching of armyworm. Therefore, the flowering of paulownia can be used as the prediction of armyworm hatch. At the same time, also found bitter Sheng Sheng Zhan leaf, armyworm began to bite the wheat leaves, the miserable Sheng Zhan Ye as a worm prevention and control warning. This shows that under normal circumstances, phenology can be timely and comprehensively