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Biology and chemical ecology of the sugarcane beetle and integrated pest management of sweet potato soil insects in Louisiana.

机译：路易斯安那州甘蔗甲虫的生物学和化学生态学以及甘薯土壤昆虫的病虫害综合治理。

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摘要

Host plant preference and chemical ecology of the sugarcane beetle, Euetheola humilis, were evaluated in greenhouse and laboratory studies. Sweet potato, Ipomoea batatas, was significantly preferred over all other plant species evaluated in a host plant preference test. Corn, Zea mays, and sugarcane. Saccharum spp., were the next most chosen plant species in the study. In olfactometer experiments, sugarcane beetles responded significantly more to beetle injured and mechanically injured roots vs. uninjured roots. Male and female beetles were also significantly more attracted to female conspecifics. Differences were not detected between sweet potato cultivars in olfactometer trials. Cultivar preference studies suggested that some cultivars may be more attractive than others.; Susceptibility of sugarcane beetle and Sweetpotato weevil, Cylas formicarius, to selected insecticides was evaluated in laboratory bioassays. Sugarcane beetles were significantly more susceptible to z-cypermethrin than to chlorpyrifos and bifenthrin. Sweetpotato weevils from two cohorts were most susceptible to methyl parathion and the cohorts were differentially susceptible to selected insecticides. Reduced susceptibility of a reference cohort of Sweetpotato weevil was noted for all insecticides evaluated.; A planting date study was conducted over two years in two locations in Louisiana. Damage from soil insects in sweet potato can be affected by many factors, such as insect abundance and life stage, and stage of the crop. A representative early, middle, and late planting date were used to assess soil insect abundance and damage throughout the sweet potato production season. Planting date affected damage from soil insects in sweet potato. Significantly more total insect damaged roots were sampled from late planting dates compared to early and middle planting dates. Cucumber beetle, Diabrotica spp., damage was greater in late planting dates, relative to early and middle planting dates. Late planting dates also had an increased probability of sugarcane beetle damage compared to early and middle planting dates. The majority of adult insects sampled were Diabrotica beetles and Diabrotica abundance was variable throughout the season and was positively correlated with percent larvae damaged roots at various seasonal intervals.; Sweet potato soil insect abundance and damage was also investigated at various herbicide regimes in a two year study. Differences in soil insect damage or adult insect abundance were not detected between various herbicide regimes. U.S. No. 1 and 2 yield was significantly higher in herbicide treated plots vs. untreated control plots and weed densities were significantly reduced in some treated plots compared to untreated control plots.; Sugarcane beetle studies have provided information on the biology, chemical ecology and possible management options for this insect in sweet potato. In addition, these studies have examined the importance of an integrated pest management system in sweet potato. Integrated pest management involves manipulating the crop as well as careful management of insect species.
机译：在温室和实验室研究中评估了甘蔗甲虫Euetheola humilis的寄主植物偏好和化学生态。在寄主植物偏好测试中评估的甘薯（番薯番薯）明显优于所有其他植物物种。玉米，玉米，玉米和甘蔗。蔗糖属是该研究中第二大选择的植物物种。在嗅觉仪实验中，与未受伤的根相比，甘蔗甲虫对受伤的和机械受伤的根的反应明显更多。雌，雄甲虫也显着地被雌性物种吸引。在嗅觉仪试验中未发现甘薯品种之间的差异。品种偏好研究表明，某些品种可能比其他品种更具吸引力。在实验室生物测定法中评估了甘蔗甲虫和甘薯象鼻虫（Cylas formicarius）对所选杀虫剂的敏感性。甘草甲虫对氯氰菊酯的敏感度明显高于毒死rif和联苯菊酯。来自两个队列的甘薯象鼻虫对甲基对硫磷最敏感，对选定的杀虫剂有不同的敏感度。对于所有评估的杀虫剂，均注意到甘薯象鼻虫参考队列的敏感性降低。在路易斯安那州的两个地点进行了为期两年的播种日期研究。甘薯中土壤昆虫的危害可能受到许多因素的影响，例如昆虫的丰度和生命周期以及作物的生长阶段。在整个红薯生产季节，使用代表性的早期，中期和晚期播种日期来评估土壤昆虫的丰度和损害。播种日期影响了甘薯中土壤昆虫的危害。与播种早期和中期相比，从播种后期开始对虫害根的总采样数要多得多。黄瓜甲虫（Diabrotica spp。）在播种后期的损害相对于播种早期和中期都更大。与早期和中期播种日期相比，后期播种日期也增加了甘蔗甲虫损害的可能性。采样的大多数成虫是杂虫（Diabrotica）甲虫，整个季节中杂虫（diabrotica）的丰度是可变的，并且在各个季节间隔与幼虫受损根的百分数呈正相关。在一项为期两年的研究中，还研究了各种除草剂制度下甘薯土壤昆虫的丰度和危害。在各种除草剂方案之间未发现土壤昆虫损害或成虫丰富度的差异。与未处理的对照样地相比，在除草剂处理的样地中美国1号和2号产量显着更高，并且在某些处理的样地中杂草密度显着降低。甘蔗甲虫研究提供了有关甘薯中这种昆虫的生物学，化学生态学和可能的管理选择的信息。此外，这些研究还研究了在甘薯中建立病虫害综合管理系统的重要性。病虫害综合治理涉及对作物的操纵以及对昆虫种类的仔细管理。

著录项

  • 作者

    Smith, Tara P.;

  • 作者单位

    Louisiana State University and Agricultural & Mechanical College.;

  • 授予单位 Louisiana State University and Agricultural & Mechanical College.;
  • 学科 Biology Entomology.; Agriculture Plant Pathology.
  • 学位 Ph.D.
  • 年度 2006
  • 页码 122 p.
  • 总页数 122
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 昆虫学;植物病理学;
  • 关键词

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