COMPARATIVE-ANALYSIS OF SELECTED SAMPLING METHODS FOR ADULT BEMISIA-TABACI (HOMOPTERA, ALEYRODIDAE) IN COTTON
COMPARATIVE-ANALYSIS OF SELECTED SAMPLING METHODS FOR ADULT BEMISIA-TABACI (HOMOPTERA, ALEYRODIDAE) IN COTTON
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DOI：
10.1093/jee/88.6.1666
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发表时间：
1995-12-01
影响因子：
2.2
通讯作者：
HENNEBERRY, TJ
中科院分区：
文献类型：
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作者：
NARANJO, SE;FLINT, HM;HENNEBERRY, TJ
以3年为研究对象，对不同粘捕法和2种直接计数法在棉花上测定烟粉虱（Gennadius）成虫数量的可靠性进行了评价。比较不同大小、方向和放置位置的粘捕器，水平方向（7.6 × 7.6 cm）的上表面暴露的粘捕器在整个季节中每平方厘米捕获的成虫数量最多，放置在田地边缘的地面上，其次是放置在田地内的地面上。在使用杀虫剂之前，使用翻叶法和油黑锅法捕获的所有类型的陷阱和计数与同一周田间未成熟虫的丰度高度相关，甚至与一周后计数的未成熟虫的丰度相关。施用杀虫剂后，相关性较低且变化较大。所有成虫取样方法中，不同地点和年份的成虫丰度与未成熟种群相关的回归方程差异显著。这种可靠的预测关系是无法形成的。两种直接计数方法之间的相关性较高，但在同一农田估算种群时，叶片翻转法与黑盘法相比，个体样本之间的差异要小得多。考虑到可接受的精度水平所需的样本量和每种抽样方法的单位成本（时间），黑锅法的成本是翻叶法的3.5倍，粘捕法的成本是同一地区估算种群成本的3.6至19.7倍。用叶片翻转法估计成虫种群平均耗时约6 min，精度（SE/mean）为0.25。基于采样者之间的可变性和成本考虑，翻叶法是估计所检查的成虫丰度的最可靠和有效的技术。
We evaluated the reliability anti efficiency of various sticky traps and 2 direct-count sampling methods for estimating tbe abundance of Bemisia tabaci (Gennadius) adults in cotton, Gossypium hirsutum L., during a 3-yr period. Comparing sticky traps of various sizes, orientations, and placements, horizontally oriented traps (7.6 by 7.6 cm) with the upper surface exposed consistently captured the most adults per square centimeter over the season when placed at ground level at field edges followed by those placed within fields at ground level. Before insecticide applications, captures on all trap types and counts using a leaf-turn method and an oiled black pan method were highly correlated with the abundance of immatures in the field the same week, and even better col related with immatures counted 1 wk later. After insecticide application, correlations were Lower and more variable. Regression equations relating adult abundance to immature populations varied significantly between sites and over years for all adult sampling methods. This, robust predictive relationships could not be formulated. The 2 direct-count methods were highly correlated with one another, but the leaf-turn method was much less variable between individual samplers than the black pan method when estimating populations in the same field. Accounting for sample sizes needed for an acceptable level of precision and the per unit cost (time) of each sampling method, the black pan method was 3.5 times more costly than the leaf-turn method, and sticky traps were from 3.6 to 19.7 times more costly in estimating populations in the same fields. on average it took approximate to 6 min to estimate adult populations with a precision (SE/mean) of 0.25 using the leaf-turn method. Based on between-sampler variability, and cost considerations, the leaf-turn method was the most reliable and efficient technique for estimating adult abundance of those examined.