棉田绿盲蝽种群密度的调查方法

Sampling techniques for estimating the population density of Apolygus lucorum in cotton fields

本文比较研究了棉田绿盲蝽Apolygus lucorum(Meyer-Dür)种群的调查方法。全株调查法中,目测法调查到的绿盲蝽种群密度最高,显著高于扫网法和盆拍法。局部调查法发现,蕾上的绿盲蝽种群数量显著高于叶片和花上;蕾上种群数量与整株密度之间呈显著正相关关系(y=1.18 x+3.69)。间接调查法表明:在苗期和蕾期,叶片受害等级和绿盲蝽种群密度之间呈显著正相关关系(苗期:y=25.28 x+8.20;蕾期:y=43.99 x+27.58)。

Sampling methods for estimating the abundance of Apolygus lucorum（Meyer-Dur） were compared in cotton field in Langfang, Hebei Province during 2009--2010. The results show that the population density estimate obtained by the visual count method was significantly higher than that obtained by the sweep-net and drop-tray methods. Density on cotton buds was higher than on cotton flowers and leaves. Moreover, there was a simple linear relationship （y = 1.18 x ＋ 3.69） between the population density on buds （x） and that on whole plants （y）. At the seedling and budding stages there was a significant correlation （ seedling period, y = 25.28 x ＋ 8.20; budding period, y = 43.99 x ＋ 27.58） between the population density of A. lucorum （x） and the degree of leaf damage （y）. All the above information provides options for sampling this important pest.