Control of the rice stem borer and rice leaf folder using the seed dressing agent chlorantraniliprole
Author of the article:HAN Yong-Qiang;LI Dan-Dan;DENG Quan-Quan;WANG Long-Jiang;HOU Mao-Lin
Author's Workplace: Key Laboratory of Crop Growth and Development Regulation Jiangxi Province, College of Life Sciences and Resource Environment, Yichun University, Yichun 336000, China; State Key Laboratory for Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
Key Words:chlorantraniliprole; Chilo suppressalis; Cnaphalocrocis medinalis; seed treatment; control efficiency
Abstract:
[Objectives] To introduce a simple and labor-saving method of controlling the rice stem borer (RSB) and
rice leaf folder (RLF) and thereby reduce the frequency of pesticide
application and the amount of pesticide applied. [Methods] Rice seeds were treated with different
concentrations of 50% chlorantraniliprole FS. The spray control was 5%
chlorantraniliprole SC, or 3% abamectin EW in the field, and the control was no
pesticide spray. Germination and emergence were determined in a laboratory. Control
of the RSB and RLF, and rice yields achieved under the different seed
treatments, were evaluated in both directly seeded, and transplanted, field
plots. [Results] Germination and
emergence were not affected by treatment with chlorantraniliprole
concentrations of 150 mL/hm2 or 120 mL/hm2. Treatment of
seeds with 150 mL/hm2 of chlorantraniliprole resulted in less RSB
and RLF damage to rice plants compared to the spray control in directly seeded plots 62 days after
sowing, and in transplanted plots 56 days after transplanting. The 150 mL/hm2 chlorantraniliprole treatment achieved > 93.33% control of the RSB and > 70.31% control of the RLF. Effective panicle number, panicle length, grain-filling percentage,
1000-grain weight and yield, were all higher in the 150 mL/hm2 chlorantraniliprole treatment than in the spray control in both cultivation modes. [Conclusion] The results indicate that dressing rice seeds with chlorantraniliprole
does not affect germination and is an effective method of controlling both the
RSB and RLF, thereby increasing rice yield. This method has great potential as
a simple and labor-saving method of controlling lepidopteran pests of rice.