摘要
研究了不同数量的烟草粉螟繁殖1代和2代(1a)幼虫危害所造成的烟叶重量和叶面积损失以及烟叶的被害率和各级烟叶的伤残率,核算了1～5对烟草粉螟繁殖2代危害所造成的经济损失.结果表明,1,2,3对烟草粉螟繁殖1代幼虫取食的烟叶重量分别为0 53,1 07,2 93g;损失的烟叶面积分别为37 32,75 59,206 34cm2.1,2,3,4,5对烟草粉螟繁殖2代幼虫取食的烟叶重量分别为1 37,3 57,6 30,13 42,24 20g;损失的烟叶面积分别为88 39,230 32,406 45,865 81,1561 29cm2;幼虫取食造成的直接经济损失分别为0 010,0 026,0 047,0 100,0 180元;因伤残降级降价造成的经济损失分别为0 316,1 051,1 932,2 896,4 392元;1a中共损失金额分别为0 326,1 077,1 978,2 996,4 572元.并将供试成虫对数与繁殖2代幼虫取食烟叶重量、损失烟叶面积及经济损失进行理论曲线拟合,经F检验,方程代表性均好.
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 accountedThe results showed that weight of leaf eaten by ephistia elutella in one generation under 1,2,3 pairs were respectively 053,107,293 g;leaf area lost were respectively 3732,7559,20634 cm2The weight of leaf eaten by Ephistia elutella in two generation under 1,2,3,4,5 pairs were respectively 137, 357, 630, 1342, 2420 gLeaf area lost were respectively 8839,23032,40645,86581,1 56129 cm2;the direct economic loss caused due to larva rate leaf were respectively 0010,0026,0047,0100,0180 yuan;the economic loss caused due to demoting and reducing price for broken were respectively 0316,1051,1932,2896,4392 yuan;the total lost money during one year were respectively 0326,1077,1978,2996,4572 yuanThe 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
出处
《河南农业大学学报》
CAS
CSCD
2002年第4期352-355,共4页
Journal of Henan Agricultural University
基金
河南省科委资助项目(964014300)
关键词
烟草
粉螟
危害
储存
经济损失
Ephsistia elutella
stored tobacco leaf
economic loss
