Occurrence Regularity and Control of Thrips on Leek

• 作者: Chen Dexi Guo Yunjian He Zhongquan Huang Tengfei Liu Fuping Liu Huan Lu Daijuan Yi Xueqing
• 来源期刊: Plant Diseases and Pests(植物病虫害研究:英文版)
• 学科: 农学
• 关键词: LEEK FRANKLINIELLA OCCIDENTALIS Biological characteristics OCCURRENCE REGULARITY Control method
• 年，卷（期）: pdapzwbchyj_2018,（3）
• 页码范围: 33-39
• 页数: 7页
• 分类号: S

摘要

[Objective] The paper was to clear the species and occurrence regularity of thrips severely occurred in leek field, and to study the main control methods.[Methods] The species of thrips on leek were identified in Sichuan Province, and the damage symptoms, occurrence regularity and control methods of thrips in leek field were studied.[Result] The morphological characteristic of thrips on leek was Frankliniella occidentalis (Per-gande). ITS molecular identification results showed that the amplified fragment was 520 bp, which shared the similarity of 99.81% with the base se-quence of F. occidentalis. F. occidentalis concentrated at the height of 80 cm from the ground;in sunny days, the occurrence frequency of F. occi-dentalis was relatively high during 15:00 and 17:00;rainwater had obvious lethal effect on F. occidentalis, and the lethal rate was 29.30%. Field trial showed that 20% dinotefuran SG and 40% acetamiprid GR had good control effect against F. occidentalis. The control effect of 20% dinotefu-ran SG 1 500 times dilution was the best, up to 92.56%.[Conclusion] The results will provide effective technical support for large-scale control of thrips in leek field.