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《Journal of Henan Agricultural University》 2002-04
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Study on the economic loss of stored tobacco leaf destroyed by Ephistia elutella

LUO Meihao1, MA Shujian1, CHENG Zhansheng2,et al(1College of Plant Protection,Henan Agricultural University,Zhengzhou 450002,China;2Tobacco Corporation of Mengjin County,Mengjin 471100,China)  
This paper deals with a preliminary study on the weight lost,the area lost,the infected rate and the broken ratio of stored tobacco leaf caused by different numbers of Ephsistia elutella in one and two generations (during one year)The economic losses caused by the pest of 1~5 adult pairs in two generations were also accountedThe results showed that weight of leaf eaten by ephistia elutella in one generation under 1,2,3 pairs were respectively 053,107,293 g;leaf area lost were respectively 3732,7559,20634 cm2The weight of leaf eaten by Ephistia elutella in two generation under 1,2,3,4,5 pairs were respectively 137, 357, 630, 1342, 2420 gLeaf area lost were respectively 8839,23032,40645,86581,1 56129 cm2;the direct economic loss caused due to larva rate leaf were respectively 0010,0026,0047,0100,0180 yuan;the economic loss caused due to demoting and reducing price for broken were respectively 0316,1051,1932,2896,4392 yuan;the total lost money during one year were respectively 0326,1077,1978,2996,4572 yuanThe following equations can indicate the relationship between the different male and female adult pairs and weight of leaf eaten,leaf area lost and economic loss caused by their larvae in two generations respectively
【Fund】: 河南省科委资助项目(964014300)
【CateGory Index】: S435.72
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