日本《农业技术》一九七七年五月号报道,实行不同作物混作,可以减轻虫害。国际水稻研究中心一九七二年的资料表明,玉米种植密度为每公顷40,000株时,有花生混作,可使螟虫为害株率从86％减少到30％;玉米密度为每公顷20,000株时,有花生混作的被害株率从60％减少到21％。因为玉米种植密度低时对螟虫的生存不适宜,所以混作 Japan’s “Agricultural Technology” reported in May 1977 reported that the implementation of mixed crops of different crops can reduce pests. Information from the International Research Center for Rice Research (IAR) in 1972 shows that when the planting density of maize is 40,000 per hectare, peanut intercropping can reduce the damage rate of stem borers from 86% to 30%; when the density of maize is 20,000 per hectare, Peanut mixed with the victim plant rate reduced from 60% to 21%. Because corn planting density is not suitable for the survival of stem borers, so mixed