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１９９３年在山东省寿光、泰安、淄博的苹果园大面积施用线虫 Ｓｔｅｉｎｅｒｎｅｍａ ｃａｒｐｏｃａｐｓａｅ Ａｇｒｉｏｔｅｓ防治桃小食心虫 Ｃａｒｐｏｓｉｎａ ｎｉｐｐｏｎｅｎｓｉｓ Ｗａｌｓｉｎｇｈａｍ，并作不同线虫剂量的比较试验，同时测定的土温、气温和相对湿度。结果表明，在２９９公顷苹果园，每公顷施用线虫１５亿，在适宜的温、湿度（土温２６．２℃－２７．１℃，气温２５．５℃－２９．５℃，相对湿度８０％－８９％）条件下，桃小食心虫的累计卵果率为０．４％～０．５％；而在气温过高，较干燥（土温为２６．５℃～２９℃，气温２９．５℃～３４℃，相对湿度为７６．８％）条件下，桃小食心虫累计卵果率为２．４％。每公顷施用７．５亿和３．７５亿线虫的果园，桃小食心虫的累计卵果率为１．５％～２．９％。以常规药剂处理的累计卵果率为１．５％和２．１％。清水对照的累计卵果率为２．８％与３．８％。说明应用昆虫病原线虫防治桃小食心虫能获得好的效果，值得大力推广。
In 1993, the nematode Steinernema carpocapsae Agriotes was used to control Carposina nipponensis Walsingham in the apple orchards of Shouguang, Tai’an and Zibo in Shandong Province. The soil temperature, air temperature and relative humidity were determined at the same time. The results showed that in a 299-hectare apple orchard, nematodes were applied at 1.5 billion hectares per hectare under suitable temperature and humidity (soil temperature 26.2 ℃ -27.1 ℃, air temperature 25.5 ℃ -29.5 ℃, relative humidity 80% -89%), the cumulative egg percentage of peach moth was 0.4% ~ 0.5%, while in the case of over-temperature and dryness (soil temperature 26.5 ℃ ~ 29 ℃, temperature 29.5 ℃ ~ 34 ℃, relative humidity of 76.8%) under the conditions of peach mung bean cumulative egg percentage was 2.4%. Orchard with 750 million hectares and 375 million nematodes per hectare, and the cumulative egg percentage of peach wormworm is 1.5% -2.9%. The cumulative egg percentage was 1.5% and 2.1% for conventional treatments. The cumulative egg control rate of fresh water was 2.8% and 3.8% respectively. Application of insect pathogen nematode peach prevention and control can get good results, it is worth to promote.