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在蔬菜栽培中有二大难题,即重茬和病害。近年来,很多学者倡导倒茬轮作、土壤消毒、嫁接等方法,但在蔬菜集中产区倒茬轮作实有困难,土壤消毒投资大且有副作用,嫁接只适用于部分蔬菜且费工难以大面积推广。在这种情况下,日本枥木县农业试验场生物工学部木岛利男氏进行了生物防治试验,其中获得显著成效並已开始推广的即是混种葱类防治病害法。一、混种葱类防治病害日本耕地少,历来间套种较盛行。从二、三百年前在农村就流传着大葱能够防治病害的传统技术。枥木县河内郡南河内町有一位老农妇一直教给儿子采用混种大葱来防治病害。该县下都贺郡国分寺町
There are two major problems in vegetable cultivation, namely, cropping and disease. In recent years, many scholars advocate crop rotation, soil disinfection, grafting and other methods, but in the concentrated vegetable production areas crop rotation difficulties, soil disinfection of large investment and side effects, grafting only applies to some vegetables and difficult to promote large-scale popularization. Under such circumstances, the biological control test was carried out in Kishima lily, Department of Biotechnology, Agricultural Experimental Station, Tochigi Prefecture, Japan. Among them, remarkable results have been achieved and the promotion of the prevention and control of diseases by onion has been carried out. First, the mixed species of prevention and control of diseases on the Japanese arable land, intercropping has been more prevalent. From two to three hundred years ago in the rural areas spread green onions to prevent disease traditional techniques. An elderly peasant woman in Nananai-machi, Hanoi-gun, Tochigi, has been teaching his son to use mixed green onions to prevent and cure diseases. Koshidori-gun, Shita-gun County