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首页> 外文学位 >RICE STINK BUG, OEBALUS PUGNAX (F.), ON RICE: EVALUATION FOR PLANT RESISTANCE, INTERACTION OF FIELD FUNGI WITH FEEDING DAMAGE, AND EVALUATION OF INSECTICIDES FOR CONTROL.
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RICE STINK BUG, OEBALUS PUGNAX (F.), ON RICE: EVALUATION FOR PLANT RESISTANCE, INTERACTION OF FIELD FUNGI WITH FEEDING DAMAGE, AND EVALUATION OF INSECTICIDES FOR CONTROL.

机译：Oebalus PUGNAX（F.）的大米臭虫：关于植物抗性的评估，田间真菌与饲喂损害的相互作用以及用于控制的杀虫剂评估。

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摘要

Feeding punctures of the rice stink bug (RSB), Oebalus pugnax (F.), provide fungi entry sites into rice, Oryza sativa (L.), grains and kernels (hulled grains). Feeding sheaths also serve as a source of nutrients for fungi.;Reductions in the number of full grains in medium and long-grain rice lines can be estimated using a 9% saline solution. The highest average rate of misclassification was 13.8% and these grains were pecky and immature. Resistance to RSB in rice lines can be compared by infesting panicles in the early milk stage (about 10 days after flowering) with three pairs of RSB adult pairs for 5 days. Either females, males, or pairs should be used consistently because females reduced the number of full grains more than males or pairs.;Fifty-seven rice breeding lines, predominantly from the 1982 and 1983 foliar disease nursery, were evaluated for resistance to RSB injury. Seventeen lines had less than a 26% reduction in number and/or weights of full grains.;The insecticides currently recommended for RSB control in Louisiana, encapsulated methyl parathion (0.3 kg AI/ ha), methyl parathion (0.3 kg AI/ ha), and Sevin XLR (1.1 kg AI/ ha), were re-evaluated. Encapsulation of methyl parathion extended activity for an additional day and this formulation was more toxic than methyl parathion to RSB in the first 24 hours of exposure. Carbaryl was active one day longer than the other insecticides, but all insecticides lost activity by 72 hours after application.;Grain spotting fungi did not affect the percentage of spotted kernels (pecky rice) and significantly reduced full grain weight only at low infestation rates of one and two RSB per panicle. Panicles had been treated with a single application of propriconazol (1000 ppm) soon after flowering and later infested in the early milk stage with RSB adult pairs for 9 days. Propriconazol was not toxic to RSB adults. Infested rice lines were less susceptible to losses in full grain weight as panicles matured, but varied in the percentage of pecky kernels.
机译：稻臭虫（Oebalus pugnax）（F.）的取食刺孔为稻，稻（L.），谷物和谷粒（去壳谷物）提供了真菌入口。进料鞘也可作为真菌的营养来源。使用9％的盐溶液可以估算中粒和长粒水稻品系中全谷物的数量减少。平均分类错误率最高，为13.8％，这些谷物呈啄状且未成熟。可以通过在牛奶早期（开花后约10天）与三对成年对RSB侵染穗部，来比较水稻对RSB的抗性。雌性，雄性或成对的雄性应连续使用，因为雌性比雄性或成对的全谷物减少更多。;评估了57个水稻育种系（主要来自1982年和1983年的叶病育苗场）对RSB伤害的抵抗力。十七个品系的全谷粒数量和/或重量减少了不到26％。；目前建议在路易斯安那州进行RSB控制的杀虫剂包括：封装的甲基对硫磷（0.3 kg AI / ha），甲基对硫磷（0.3 kg AI / ha）和Sevin XLR（1.1千克AI /公顷）进行了重新评估。甲基对硫磷的包封延长了一天的活性，并且该制剂比甲基对硫磷在暴露的前24小时内对RSB的毒性更大。 Carbaryl的活性比其他杀虫剂长一天，但所有杀虫剂在施用后72小时都失去活性。谷物点菌并没有影响斑点果仁（啄米）的百分比，仅在低虫害率下才显着降低了全谷粒重量。每个穗一个和两个RSB。开花后不久，立即用一次施用propriconazol（1000 ppm）处理穗，随后在早期乳汁中用成对的RSB成对侵染9天。普罗普那唑对RSB成人无毒。穗成熟时，受侵染的水稻品系不易遭受全粒重的损失，但啄果粒的百分比却有所不同。

著录项

  • 作者

    HOLLAY, MARIEANNE EVA.;

  • 作者单位

    Louisiana State University and Agricultural & Mechanical College.;

  • 授予单位 Louisiana State University and Agricultural & Mechanical College.;
  • 学科 Entomology.
  • 学位 Ph.D.
  • 年度 1987
  • 页码 174 p.
  • 总页数 174
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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