Observation of natural death on snails in ditch in hills region;
丘陵地区沟渠钉螺自然死亡观察
Based on the sample survey on the infested Sophora japonica,the reasons of natural death of the Apriona swainsoni population were studied.
通过对受害国槐抽样调查,系统研究了锈色粒肩天牛种群的自然死亡原因。
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