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本项研究结果表明 :(1)在塑料大棚内 ,南美斑潜蝇虫道面积百分率与芹菜产量呈负相关 ,而与芹菜产量损失率呈正相关 ,直线回归方程分别为Y =3 36 5 8- 0 0 2 6 75X和Y =2 15 899+ 0 0 8184X ,即虫道面积百分率每增加 1% ,产量减少 0 0 2 6 75kg ,产量损失率增加 0 0 8184%。 (2 )南美斑潜蝇为害大棚芹菜经济阈值数学模型X =14 0 845ln 2 3 15 75L6 8 0 75 -L
The results of this study showed that: (1) In the plastic greenhouse, the percentage of the area of A. leptoprolol was negatively correlated with the yield of celery and the yield loss of celery. The linear regression equations were Y = 3 36 5 8- 0 0 2 6 75X and Y = 2 15 899 + 0 0 8184X, that is, every 1% increase in the area of the larvae resulted in a decrease of 0 0 2 6 75 kg and an increase of yield loss of 0.08184%. (2) Mathematical model of economic threshold of Celery leafminer in South China X = 14 0 845ln 2 3 15 75L6 8 0 75 -L