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首页> 外文期刊>Journal of Economic Entomology >Most susceptible stage of rice panicle development to Oebalus pugnax (Hemiptera : Pentatomidae)
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Most susceptible stage of rice panicle development to Oebalus pugnax (Hemiptera : Pentatomidae)

机译：水稻圆锥花序发育最易发生于美洲豹（Hemiptera：Pentatomidae）

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摘要

Oebalus pugnax (F.) (Hemiptera: Pentatomidae) damage to rice, Orya savita L., reduces rough and head rice yields, and grain quality. O. pugnax feeds on developing kernels, introducing pathogenic fungi and causing a discoloration of the grain known as "peck." The objective of this study was to determine the stage of rice panicle development most susceptible to O. pugnax attack. During 2005 and 2006, in greenhouse and field experiments, rice plants were caged at the boot stage and then infested with adult or nymphal O. pugnax. Plants were infested during one of three stages of panicle development: heading, milk, or soft dough. Insects were allowed to feed on the plants for the duration of each stage and then killed. After maturation, panicles were harvested, and grain was hulled and milled. Grain weight, percentage of pecky grain, and percentage of whole grain after milling were recorded. No differences were found in the weight of rough, brown, or milled rice infested with O. pugnax during different stages of panicle development. Number of filled grains per cage was not affected by O. pugnax, and number of empty grains per cage was affected in two of four experiments. Higher percentage of peck was found in grain from particles infested during dough and milk than in grain from panicles infested during heading. Adult O. pugnax caused higher percentage of peck than nymphs in all stages of panicle development. An inverse relationship was found between percentage of peck and percentage of whole grain weight only in one of the experiments.
机译：Oebalus pugnax（F.）（Hemiptera：Pentatomidae）对水稻Orya savita L.的损害降低了糙米和糙米的单产以及谷物质量。 O. pugnax以发育中的谷粒为食，引入致病真菌，并导致被称为“啄”的谷物变色。这项研究的目的是确定最易受粉虱侵袭的稻穗发育阶段。在2005年和2006年期间，在温室和田间试验中，水稻植物在启动阶段被关在笼子里，然后被成年或若虫O. pugnax侵害。在穗发育的三个阶段之一中，植物受到侵害：抽穗期，牛奶或软面团。在每个阶段的持续时间内，让昆虫以植物为食，然后将其杀死。成熟后，收获穗，将谷物去壳并研磨。记录碾磨后的谷物重量，百分百谷物的百分比和全谷物的百分比。在穗发育的不同阶段，被O. pugnax侵染的糙米，糙米或碾米的重量没有发现差异。每个笼子中的饱满谷粒数量不受O. pugnax影响，并且在四个实验中的两个实验中，每个笼子中的空谷粒数量均受到影响。在面团和牛奶中，被侵染的谷物中的啄食百分率高于抽穗期间被侵染的圆锥花序中的啄食百分率。在穗发育的所有阶段中，成年的O. pugnax引起的啄食百分率均高于若虫。仅在其中一项实验中，啄食百分率与全谷物百分率之间存在反比关系。

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