三七蓟马发生规律调查研究

摘要

Three years’ investigation has been done in order to discover the occurrence regularity of Panax Notoginseng thrips. The survey shows that thrips usually start in the late March and end in the late December in Wenshan. There are two peaks of pest occurrence, distributing from the early April to the mid May and from the early August to the early September respectively. Damage caused by pests mainly occurs on full seed leaf stage. In the same year, the number of pest occurring to three-years-old plant is more than that to two-year-old and that to two-year-old plant is more than that to young age plant. The result shows that older plant victims are over younger plant victims. The paper suggests that the control be based on prevention ifrst and comprehensive treatment second.%为探明三七蓟马的发生规律，开展了历时3年的调查。调查表明三七蓟马在文山地区通常始见于3月下旬，终见于12月下旬。蓟马的发生有两个高峰期，分别集中在4月上旬至5月中旬、8月上旬至9月上旬，其中蓟马危害三七的主要时期是三七齐苗展叶期。在相同年份，虫口数量表现为三年七＞二年七＞一年七，说明大龄三七受害重于低龄三七。建议根据发生规律，对三七蓟马的防治采取预防为主、综合治理。