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2007和2008年8月上旬,通过野外调查研究了四川长足大竹象虫口密度、虫孔数、竹笋受害率之间的相关关系.结果表明:研究区长足大竹象平均虫口密度与平均虫孔数、平均虫口密度与竹笋受害率、竹笋受害率与平均虫孔数3对变量用一元三次函数拟合的效果最佳,其相关系数均达到极显著水平.根据最优拟合方程建立了虫口密度、竹笋受害率的预测表,得出长足大竹象的防治指标为虫口密度0.13头.笋-1、虫孔数0.40个.笋-1.
2007 and the first ten days of August 2008, the correlation between the population density, the number of insect holes and the damage rate of bamboo shoots in Oxya longibes was studied through the field investigation.The results showed that the average population density, The average insect population density, the damage rate of bamboo shoots, the damage rate of bamboo shoots and the average number of wormholes were the best, and the correlation coefficients reached the most significant level.According to the optimal fitting equation, Bamboo shoot damage rate forecast table, draw a large enough to control the index for the Ophiopogon japonicus population density of 0.13 head shoot -1, wormhole number 0.40 shoots -1.