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通过江苏淮南、淮北棉区棉铃虫寄主植物种类凋查,已查明60种栽培植物、34种野生植物为棉铃虫寄主,它们分属24个科,其中以禾本科、豆科、菊科、葫芦科、十字花科、锦葵科、百合科、旋花科、藜科种类居多。运用选择系数法和适合性指数法定量测定了30种常见寄主植物对棉铃虫的适合性程度,建立了选择强度与适合性程度估测模型,据此将棉铃虫众多寄主划分为适宜寄主、较适宜寄主与次要寄主三大类。并在上述工作基础上,结合寄主植物种植面积情况,明确了各代次棉铃虫主要栽培寄主种类,以优化棉铃虫测报与防治技术。
Through the investigation of host plants of cotton bollworm in Huainan and Huaibei cotton areas in Jiangsu Province, 60 kinds of cultivated plants have been identified and 34 kinds of wild plants are host to the cotton bollworm. They belong to 24 families, including Poaceae, Leguminosae, Compositae, Cucurbitaceae, Cruciferae, Malvaceae, Liliaceae, Convolvulaceae, Chenopodiaceae mostly. The suitability of 30 common host plants to cotton bollworm (Helicoverpa armigera) was quantitatively determined by the method of selection coefficient and suitability index, and the estimation model of the selection intensity and suitability degree was established. Based on this, many hosts of H. armigera were classified as suitable hosts, Suitable host and secondary host three categories. On the basis of the above work, combined with the planting area of host plants, the main cultivars of H. armigera were identified in order to optimize the report of cotton bollworm and the control techniques.