The effectiveness of phosphine, in combination with three kinds of protective agents, for controlling three major pests of stored grain
Author of the article:YU Bo1** WU Yun-Long2 WANG Li-Li3 MIAO Shi-Yuan2 XU An-Jun4 LU Yu-Jie2***
Author's Workplace：1. Zhejiang Grain Group Company Limited, Hangzhou 310006, China; 2. School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212100, China; 3. Jiangxi Grain and Materials Reserve Bureau, Nanchang 330000, China; 4. Ru Hong Jun Li (Changzhou) Enterprise Management Company Limited, Changzhou 213000, China
Key Words：Tribolium castaneum; Sitophilus oryzae; Rhyzopertha dominica; grain protectant; phosphine; insecticide combination
Abstract：
[Aim] To improve the effectiveness of phosphine
for controlling three major pests of
stored grain; Tribolium castaneum, Sitophilus oryzae, and Rhyzopertha
dominica. [Methods] The effectiveness of 55% imidacloprid
emulsifiable concentrate, 75% malathion emulsifiable concentrate, and 2%
deltamethrin·imidacloprid powder, in combination with phosphine, was evaluated
for controlling T. castaneum, S. oryzae and R. dominica in
grain depots in three different ecological regions of Guangdong, Fujian and
Henan. [Results] Treating the grain surface layer with either
55% imidacloprid emulsifiable concentrate, 75% malathion emulsifiable
concentrate, or 2% deltamethrin·imidacloprid powder, before phosphine
fumigation, significantly affected the control of T. castaneum, S.
oryzae, and R. dominica. The best result was 100% mortality of R.
dominica in the Nanping depot in Fujian. The use of deltamethrin·imidacloprid
in conjunction with phosphine to control S. oryzae in the Zhanjiang
depot in Guangdong only achieved 55% mortality. [Conclution] However, a combination of phosphine and either
55% imidacloprid emulsifiable concentrate, 75% malathion emulsifiable
concentrate, or 2% deltamethrin·imidacloprid powder, effectively controlled T.
castaneum, S. oryzae and R. dominica in stored grain.