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1985年熊本县的西瓜栽培面积为3040公顷,形成了以植木町为代表的西瓜产地。随着产地种植规模的扩大和大型固定温室、塑料大棚栽培面种的增加带来了连作栽培,从1973年起,西瓜的连作障害逐渐严重起来。因此,由栽培、植保、土肥等学科组成综合研究小组,以西瓜连作障害的原因及其对策为课题,自1976年至1979年进行了调查研究。
Kumamoto Prefecture in 1985, the watermelon cultivation area of 3040 hectares, forming a plant represented by the Yokocho watermelon origin. With the expansion of planting scale and the increase of cultivation of large-scale fixed greenhouses and plastic greenhouses, cultivation of continuous planting has brought about continual cultivation. Since 1973, the continuous cropping-up of watermelons has become increasingly serious. Therefore, from the cultivation, plant protection, soil fertility and other disciplines to form a comprehensive research group to watermelon continuous cropping problems and countermeasures as the subject, from 1976 to 1979 conducted a survey.