期刊
PEST MANAGEMENT SCIENCE
卷 76, 期 4, 页码 1523-1530出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/ps.5670
关键词
dimethoate; drip irrigation; maize; control; Monolepta hieroglyphica
资金
- National Natural Science Foundation of China [31672044]
- Research and Development Plan in Key Areas of Guangdong Province [2019B020217003]
- Guangzhou Science & Technology Program [201707020013]
BACKGROUND Monolepta hieroglyphica (Motschulsky) is a primary pest of maize. The effect of dimethoate on controlling a M. hieroglyphica infestation was studied using drip irrigation. Field trials were conducted to determine the most effective application rate and water volume for dimethoate treatment in arid and semi-arid regions. The absorption, distribution and dissipation of dimethoate in maize and soil were examined. RESULTS Field trials showed that dimethoate at a rate of 2.70 kg a.i. ha(-1) and water volume of 200 m(3) ha(-1) was the most effective treatment for controlling M. hieroglyphica. Dimethoate via drip irrigation showed longer persistence than dimethoate applied via artificial or unmanned air vehicle spraying. Different parts of the maize plant had a hysteresis effect on dimethoate absorption. Dimethoate was absorbed from the roots, transported upward, and enriched in the leaf. Dimethoate was mainly concentrated within a certain range near the emitter after drip irrigation. Terminal residues of dimethoate in maize grain were below detectable levels 42 days after treatment. CONCLUSIONS Dimethoate treatment via drip irrigation can control M. hieroglyphica infestation on maize. Results showed that dimethoate is safe for maize and the environment. This study provides guidance for the application of pesticides in arid and semi-arid areas. (c) 2019 Society of Chemical Industry
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