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本文通过在半自然下探讨不同初始成虫密度对广聚萤叶甲Ophraella communa种群扩增的影响。结果表明:初始密度对该叶甲种群发展和扩张影响显著。高初始密度(20对)处理的种群数量上升迅速,在短期内可迅速达到较高的水平;中等密度(5～10对)处理的种群增长速度较平缓,但在30d内亦可获得较高的种群数量;低密度(3对)处理的种群增长缓慢,在较长时间内亦无法达到理想的种群数量。根据试验结果,推荐大棚规模化饲养的起始成虫密度应为0.4～0.7头/株,以确保30d内获得较高的种群数量。
In this paper, the semi-natural to explore the different initial adult density on Polygonatum Ophraella communa population amplification. The results showed that the initial density had a significant effect on the development and expansion of this leafhopper population. The populations with high initial density (20 pairs) increased rapidly and reached a relatively high level in a short period of time. The populations with medium density (5 ~ 10 pairs) grew more slowly but were higher in 30 days The population density of low density (3 pairs) increased slowly and the ideal population could not be reached within a long time. According to the test results, the recommended initial adult density of greenhouse should be 0.4 ~ 0.7 heads per plant, so as to ensure a higher population within 30 days.