【摘 要】
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一、越冬基数调查 甘薯天蛾Heres convolvuli(Linn.)以蛹越冬,查明越冬虫口基数,以估计第一代发生的程度,为早期消灭提供依据。 调查时间第一次在11—12月,第二次在次年3月,
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