Hall David G
USDA-ARS, U.S. Horticultural Research Laboratory, Subtropical Insects Research Unit, 2001 South Rock Road, Fort Pierce, FL 34945, USA.
J Econ Entomol. 2009 Feb;102(1):446-52. doi: 10.1603/029.102.0158.
Yellow sticky card traps were assessed as a tool for estimating absolute densities of adult Diaphorina citri Kuwayama (Hemiptera: Psyllidae) in citrus. Weekly trapping was conducted in young and mature trees with traps deployed directly in trees, one trap per tree. In addition, a comparison was made between one and three traps per tree in the mature trees. Solar radiation was positively correlated with numbers of adults trapped per week in both groups of trees. Air temperature was positively correlated with captures of adults in the mature trees. The value of traps as indicators of absolute densities of adults was therefore reduced by changes in sunlight and temperature. Captures of adults were not reduced by rain. A positive correlation was found for data from the young trees between trap captures of adults and maximum daily wind speed. Significant correlations were found between numbers of adults on leaves and traps. However, little confidence could be placed on individual predictions of adult densities on leaves based on numbers of adults on traps. Increasing the number of traps per tree from one to three did not improve individual estimates, although detection of adults in trees was improved using three traps when adult population levels were low. A better quantitative relationship between adults on traps and leaves might have been determined if greater sample sizes had been used to estimate densities. Regardless, day-to-day differences in sunlight and air temperature will influence numbers of adults captured on traps, thus reducing the value of traps as indicators of absolute densities.
黄粘卡诱捕器被评估为一种估算柑橘园中成年柑橘木虱（半翅目：木虱科）绝对密度的工具。每周在幼树和成年树上进行诱捕，诱捕器直接放置在树上，每棵树一个诱捕器。此外，还对成年树中每棵树放置一个诱捕器和三个诱捕器的情况进行了比较。两组树中，太阳辐射与每周诱捕到的成虫数量呈正相关。成年树中，气温与成虫捕获量呈正相关。因此，阳光和温度的变化降低了诱捕器作为成虫绝对密度指标的价值。降雨并未减少成虫的捕获量。在幼树的数据中，发现成虫诱捕量与每日最大风速呈正相关。叶片上的成虫数量与诱捕器捕获量之间存在显著相关性。然而，基于诱捕器上的成虫数量对叶片上成虫密度进行个体预测时，可信度较低。将每棵树的诱捕器数量从一个增加到三个并没有改善个体估计，尽管当成虫种群水平较低时，使用三个诱捕器可以提高对树中成虫的检测率。如果使用更大的样本量来估计密度，可能会确定诱捕器上的成虫与叶片上的成虫之间更好的定量关系。无论如何，阳光和气温的日常差异会影响诱捕器上捕获的成虫数量，从而降低诱捕器作为绝对密度指标的价值。
