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三化螟Scirphaga incertulas是亚洲稻区的主要害虫,具有多发性、钻蛀性为害特点,药剂防治技术难度大,造成损失重。寻找抗源、培育抗螟品种是最理想的防治方法。60年代以来,国内外学者开展了大规模的搜寻抗源活动,在数万份地方稻种资源或野生稻中,仅找到极少对三化螟抗性1～3级的材料。我们从80年代初开始先后筛选了2200多份品种资源,发现引自澄海县的一份普通野生稻Oryza sativa L.f.spontanea Roschev(代号SB1)对三化螟褐稻虱Nilaparvata lugéns有明显抗性,1990～1991年参照国际水稻研究所的方法及抗性评级标准,采用笼罩等量接虫,抗感对比法,对SB1抗性机制进行初步分析。
Bark borers Scirphaga incertulas is a major pest in rice fields in Asia, with multiple, borer damage characteristics, pharmaceutical control technology is difficult, resulting in heavy losses. Look for the source of resistance, cultivate anti-borer varieties is the best prevention and treatment methods. Since the 1960s, domestic and foreign scholars have carried out large-scale search and anti-source activities, and in the tens of thousands of local rice germplasm resources or wild rice, only few materials have been found that are resistant to S. Since the early 1980s, we have screened more than 2,200 varieties of resources and found that Oryza sativa Lfspontanea Roschev (code SB1), a common wild rice from Chenghai County, was found to be significantly resistant to Nilaparvata lugéns. In 1991, according to the methods and resistance grading standards of International Rice Research Institute, the resistant mechanism of SB1 was initially analyzed with the method of shrouding the same amount of pests and comparing with the anti-flu sensitivity.