Technology Development, Monsanto, 5030 Millsfield Hgwy., Dyersburg, TN 38024, USA.
J Econ Entomol. 2010 Dec;103(6):2236-41. doi: 10.1603/ec10122.
Cotton, Gossypium hirsutum L., bolls from 17 field locations in northeastern North Carolina and southeastern Virginia, having 20% or greater internal boll damage, were studied to determine the relationship between external feeding symptoms and internal damage caused by stink bug (Hemiptera: Pentatomidae) feeding. In 2006 and 2007, two cohorts of 100 bolls each were sampled at all field locations. The first cohort was removed as bolls reached approximately quarter size in diameter (2.4 cm). External and internal symptoms of stink bug feeding were assessed and tabulated. Concurrent to when the first cohort was collected, a second cohort of quarter-size-diameter bolls was identified, tagged, examined in situ for external feeding symptoms (sunken lesions), and harvested at the black seed coat stage. Harvested bolls were assessed for internal damage and locks were categorized (undamaged, minor damage, or major damage), dried, and ginned. Lint samples from each damage category were submitted for high volume instrument and advanced fiber information system quality analyses. Significant, moderately strong Pearson correlation coefficients existed between number of external stink bug feeding lesions and internal damage. Pearson correlation of total external lesions with total internal damage was stronger than any correlation among the other single components compared. Predictability plots indicated a rapid increase in relationship strength when relating external stink bug lesions to internal damage as the number of external lesions increased. Approximately 90% predictability of internal damage was achieved with four (2006) or six (2007) external lesions per boll. Gin-turnout and fiber quality decreased with increasing intensity of internal stink bug damage.
美国北卡罗来纳州东北部和弗吉尼亚州东南部 17 个田间地点的棉花（棉属）棉铃，内部棉铃损伤率达 20%或以上，研究了这些棉铃与臭虫（半翅目：蝽科）取食引起的外部取食症状和内部损伤之间的关系。2006 年和 2007 年，在所有田间地点各采集了 100 个棉铃的两个队列。第一个队列在棉铃直径达到大约四分之一大小时（2.4 厘米）被移除。评估并记录了臭虫取食的外部和内部症状。与第一个队列收集同时，确定了第二个四分之一大小直径的棉铃队列，标记、现场检查外部取食症状（凹陷损伤），并在黑种皮阶段收获。收获的棉铃评估内部损伤情况，将棉铃锁分类（未受损、轻微受损或严重受损），干燥，轧花。每个损伤类别的皮棉样本提交进行大容量仪器和先进纤维信息系统质量分析。外部臭虫取食损伤的数量与内部损伤之间存在显著的、中度强的皮尔逊相关系数。与其他单个成分的任何相关性相比，总外部损伤与总内部损伤的皮尔逊相关性更强。预测性图表明，当外部臭虫损伤与内部损伤相关时，关系强度随着外部损伤数量的增加而迅速增加。在 2006 年每棉铃 4 个或 2007 年每棉铃 6 个外部损伤的情况下，内部损伤的预测率约为 90%。轧花机产量和纤维质量随着内部臭虫损伤强度的增加而降低。
