三化螟在水稻不同生育期侵入,其侵入率和侵入后的存活率有明显的差别。罗远荣(1958)曾经进行了这方面的研究,认为蚁螟侵入秧苗,早稻侵入率与秧龄的关系差异不显著,而晚稻则随着秧龄增大,其侵入率下降。这可能与早晚季育秧方式不同有密切关系,在水稻插植后的不同生长发育期,蚁螟侵入率和侵入后的存活率也有明显的差异。古德就等(1984)曾经应用生命表方法研究三化螟蚁螟 Invaded by rice stem borer at different growth stages of rice, the invasion rate and invaded survival rate are obviously different. Luo Yuanrong (1958) conducted a study in this respect, that the infestation rate of rice stem borer invaded rice seedlings, early rice and seedling age was no significant difference, while the late rice with seedling age, the invasion rate decreased. This may be closely related to the different ways of planting seedlings in early and late season. In the different growth and development stages after rice planting, there is also a significant difference in the invasion rate and the survival rate after the invasion. Goode et al. (1984) used the life table method to study the rice stem borer, Chilo suppressalis