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Reevaluating the Economic Injury Level for Brown Stink Bug (Hemiptera: Pentatomidae) at Various Growth Stages of Maize
Journal of Economic Entomology ( IF 2.2 ) Pub Date : 2020-08-25 , DOI: 10.1093/jee/toaa173
Tim B Bryant 1, 2 , Seth J Dorman 1 , Dominic D Reisig 3 , DeShae Dillard 3 , Roger Schürch 4 , Sally V Taylor 1
Affiliation  

Abstract Economic yield loss and reduction in grain quality from brown stink bug, Euschistus servus (Say), feeding injury in early and late stages of maize, Zea mays (Poales: Poaceae, Linnaeus), development was assessed in Virginia and North Carolina in 2018 and 2019. Varying levels of stink bug infestations were introduced to seedling maize (V2—early stage), and a range of late-stages of maize, including 1) the last stage of vegetative development (V12/V14), 2) prior to tasseling, 3) at tasseling (VT), and 4) across all tested late growth stages. Euschistus servus infestation levels included 33, 67, and 100% of maize seedlings, and 25, 50, 100, and 200% of plants during later stages. Infestations were maintained on seedling maize for 7 d, and 8 or 16 d in reproductive stages. Infestation level in seedling maize had an impact on grain yield. Infestation level and growth stage both had an impact on grain yield in reproductive maize. The percentage of discolored kernels was also affected by infestation level, but not growth stage. Regression analysis between grain yield and infestation level indicated that the average economic injury level is 7% in seedling maize (7 bugs/100 plants) and 12% (12 bugs/100 plants) from the last vegetative stages (V12/V14) through pollination (VT). The economic injury level in the late vegetative stages is only applicable when infestations are present for an extended period of time (16 d), emphasizing the need for continued scouting of maize throughout the season to make informed management decisions.

中文翻译:

重新评估玉米不同生长阶段褐臭虫(半翅目:五足科)的经济伤害水平

摘要 2018 年在弗吉尼亚州和北卡罗来纳州评估了褐臭虫、Euschistus servus (Say)、玉米、Zea mays (Poales: Poaceae、Linnaeus) 早期和晚期摄食伤害的经济产量损失和谷物质量下降和 2019 年。不同水平的臭虫侵染被引入到幼苗玉米(V2-早期)和一系列后期玉米,包括 1)营养发育的最后阶段(V12/V14),2)之前雄蕊,3) 在雄蕊 (VT) 时,以及 4) 在所有测试的后期生长阶段。Euschistus servus 侵染水平包括 33%、67% 和 100% 的玉米幼苗,以及 25%、50%、100% 和 200% 的后期植物。侵染在幼苗玉米上维持 7 天,在繁殖期维持 8 或 16 天。幼苗玉米的侵染程度对粮食产量有影响。侵染程度和生育阶段都对生殖玉米的籽粒产量有影响。变色谷粒的百分比也受侵染程度的影响,但不受生长阶段的影响。籽粒产量与侵染程度的回归分析表明,从最后营养阶段(V12/V14)通过授粉,幼苗玉米(7虫/100株)的平均经济伤害水平为12%(12虫/100株) (VT)。植物生长后期的经济伤害水平仅适用于侵染时间较长(16 天)的情况,强调需要在整个季节继续对玉米进行侦察以做出明智的管理决策。变色谷粒的百分比也受侵染程度的影响,但不受生长阶段的影响。籽粒产量与侵染程度的回归分析表明,从最后营养阶段(V12/V14)通过授粉,幼苗玉米(7虫/100株)的平均经济伤害水平为12%(12虫/100株) (VT)。植物生长后期的经济伤害水平仅适用于侵染时间较长(16 天)的情况,强调需要在整个季节继续对玉米进行侦察以做出明智的管理决策。变色谷粒的百分比也受侵染程度的影响,但不受生长阶段的影响。籽粒产量与侵染程度的回归分析表明,从最后营养阶段(V12/V14)通过授粉,幼苗玉米(7虫/100株)的平均经济伤害水平为12%(12虫/100株) (VT)。植物生长后期的经济伤害水平仅适用于侵染时间较长(16 天)的情况,强调需要在整个季节继续对玉米进行侦察以做出明智的管理决策。籽粒产量与侵染程度的回归分析表明,从最后营养阶段(V12/V14)通过授粉,幼苗玉米(7虫/100株)的平均经济伤害水平为12%(12虫/100株) (VT)。植物生长后期的经济伤害水平仅适用于侵染时间较长(16 天)的情况,强调需要在整个季节继续对玉米进行侦察以做出明智的管理决策。粮食产量与侵染程度的回归分析表明,幼苗玉米(7虫/100株)的平均经济伤害水平为12%(12虫/100株)从最后营养阶段(V12/V14)到授粉(VT)。植物生长后期的经济伤害水平仅适用于侵染时间较长(16 天)的情况,强调需要在整个季节继续对玉米进行侦察以做出明智的管理决策。
更新日期:2020-08-25
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