【作者】 黄明度； 李树新；

【Author】 Huang Mingdu Li Shuxin (Guangdong Entomological Institute)

【机构】 广东省昆虫研究所；

【摘要】 本文叙述了柑桔潜叶蛾为害秋梢叶片后的叶片脱落量,不同被害级叶片的光合强度、被害秋梢当年生长量及翌年的春梢和夏梢生长量和果量以及叶片被害程度与潜叶蛾幼虫密度的关系。根据试验结果确知,秋梢叶片受害面积在20%以下对柑桔生长和翌年果重无明显影响,据此建立了产量损失率与叶片受害面积关系模型,用Chiang提出的模式计算柑桔秋梢期潜叶蛾的经济阈值为平均每嫩叶0.74头。更多还原

【Abstract】 The paper reports the photosynthesis and percentage of leaf fall in different damage levels caused by citrus leaf miner(table 1,5),the effect of tender leaf damage on growth and development of shoots and yield(table 2,3,4,5,),the relationship beween the degree of damage of leaf and the larvae density of citrus leaf miner. Based on the resuld of the experiments mention above,the conclusions are as follows: 1,when the percentage of damage area in tender leaves is below 20%,no influence to growth,development and yield would occur.2,The economic threshold of citrus leaf miner is 0.74 larval per tender leaf.更多还原