江苏徐州甘薯种植区金龟子种类调查及发生趋势初探

摘要

Frequency-vibrancy pest-kil ing lamp was used to calculate the numbers and types of scarabs during the growing period of sweet potato in Xuzhou area, thus to study the occurrence regularity of scarab and effect of meteorological factor on its occurrence, which provided a reference and guidance for the control of grub in sweet potato field. The monitoring results indicated that scarabs in sweet potato planting area of Xuzhou mainly included Anomala corpulenta, Holotrichia paral ela Motschulsky, Maladera verticalis and Holotrichia trichophora Fairm. Holotrichia tri-chophora Fairm has entered into its late stage at the early cultivation stage of sweet potato with a few occurrence quantities. The elongation stage of sweet potato vine is the ful incidence period of imagoes of Maladera verticalis and Anomala cor-pulenta. Ful incidence period of Holotrichia paral ela Motschulsky is from late June to middle August, the outbreak cycle of which is long. The unearthed imagoes fol-low the regular change "many-few-many-few". Effects of meteorological factor on the activities of various scarabs are different. The activities of various scarabs are fre-quent in warm and windless sunny days. In rainy days, Holotrichia paral ela Motschulsky, Holotrichia trichophora Fairm and Maladera verticalis are inactive. The numbers of Anomala corpulenta in cloudy days but not rainy days are higher than that in sunny days.%利用频振式杀虫灯对徐州地区甘薯生长期金龟子发生种类和数量进行统计分析，研究金龟子发生规律及气象因子对其发生活动的影响，为甘薯田蛴螬的防治提供借鉴及指导。监测结果表明，徐州甘薯种植区金龟子主要有铜绿丽金龟、暗黑鳃金龟、阔胫红绒金龟、毛黄褐金龟4种。毛黄褐金龟在甘薯栽插初期已进入发生末期，发生量少；薯蔓并长期正值阔胫红绒金龟、铜绿丽金龟成虫盛发，诱捕数量多；暗黑鳃金龟盛发期为6月下旬至8月中旬，发生周期长，且成虫出土表现出“多—少—多—少”的规律性变化。气象因子对各种金龟子的活动影响差异较大，温暖无风的晴天各种金龟子均活动频繁；阴雨天暗黑鳃金龟、毛黄褐金龟、阔胫红绒金龟3种金龟子基本不活动；铜绿丽金龟阴天成虫诱捕数量甚至高于晴天，雨天则活动较少。