目前稻蝗发生量的预报均采用查卵的方法进行测报,此法故然有效,但不够简单,且误差也大,而根据上年田间该成虫产卵前期的残留量来预报翌年蝗蝻密度(简称 SNI 测报(1)),不仅简捷,而且准确,变异系数比查卵减小了65.03个百分点,相关系数增加了0.3896;预测式是:(?)=1.6781X+29.8665。稻蝗自1984年以来在陕南稻区危害逐年加重,并有日趋加剧之势。目前稻蝗发生量不 At present, the occurrence of Oxya chinensis is predicted by ovulation method. Although this method is valid, it is not simple enough and the error is also large. According to the pre-oviposition residue in the field of the previous year, Referred to as SNI (1)) was not only simple but accurate, the coefficient of variation was 65.03% less than the egg size, and the correlation coefficient increased by 0.3896. The prediction formula was: (?) = 1.6781X + 29.8665. Since locust locusts in southern Shaanxi since 1984, the hazards have been increasing year by year, and there is an increasing trend. The current occurrence of rice locust is not