Reay-Jones F P F, Toews M D, Greene J K, Reeves R B
Clemson University, Department of Entomology, Soils and Plant Sciences, Florence, SC 29506-9727, USA.
Environ Entomol. 2010 Jun;39(3):956-69. doi: 10.1603/EN09237.
Grid sampling (one sample per 0.40 ha) in 12 cotton (Gossypium hirsutum L.) fields for stink bugs and boll injury caused by stink bug feeding was conducted in 2007 and 2008 in South Carolina and Georgia. The main species collected using the beat cloth method were the green stink bug, Acrosternum hilare (Say) (69%); brown stink bug, Euschistus servus (Say) (18%); and the southern green stink bug, Nezara viridula (L.) (14%), respectively. The inverted distance weighted interpolation method and Spatial Analysis by Distance IndicEs analyses showed spatial variability in both boll injury and stink bug densities. Four of five fields with field-average boll injury exceeding 15% had a combination of either soybean or peanut adjacent to the cotton field of interest. The Spatial Analysis by Distance IndicEs index of dispersion for stink bug densities and boll injury averaged over the season indicated significant aggregation at the 5% error rate in only one and four analyses (combinations of fields, species, and life stages) of a total of 54 in 2007 and 2008, respectively. By sampling date, overall indices of dispersion for boll injury data indicated significant aggregation in four of the 63 date-field combinations at the 5% error rate. Across years, overall indices of spatial association between boll injury and stink bug densities were significant in 17 of 69 analyses, with positive associations detected in seven of 12 fields; these data suggest that spatial distribution of stink bugs in cotton fields does not always coincide with boll injury.
2007年和2008年在南卡罗来纳州和佐治亚州，对12个棉田（陆地棉）进行了网格采样（每0.40公顷一个样本），以调查椿象及椿象取食造成的棉铃损伤情况。使用拍打布法采集到的主要椿象种类分别为绿蝽（Acrosternum hilare (Say)，占69%）、褐蝽（Euschistus servus (Say)，占18%）和稻绿蝽（Nezara viridula (L.)，占14%）。反距离加权插值法和距离指标空间分析显示，棉铃损伤和椿象密度均存在空间变异性。在五个平均棉铃损伤超过15%的田块中，有四个田块的感兴趣棉田附近种植了大豆或花生。对整个季节椿象密度和棉铃损伤的距离指标空间分析指数表明，在2007年和2008年总共54次分析（田块、物种和虫态的组合）中，仅在一次和四次分析中，以5%的误差率显示出显著聚集。按采样日期来看，棉铃损伤数据的总体离散指数表明，在63个日期 - 田块组合中的四个组合中，以5%的误差率显示出显著聚集。跨年度来看，在69次分析中的17次分析中，棉铃损伤与椿象密度之间的总体空间关联指数显著，在12个田块中的7个田块检测到正相关；这些数据表明，棉田中椿象的空间分布并不总是与棉铃损伤一致。
