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ACTION MODE, PERSISTENCE AND CONTROL VALUE OF FIPRONIL FOR RICE GRASSHOPPERS OXYA (ORTHOPTERA: CANTANTOPIDAE) *
Author(s) -
Liu Zhibin,
Wu Mingqing,
Deng Zhiyong,
Wang Qingchuan,
Chen Hanwu,
Zhang Jianping,
Launois Michel,
Zheng Zhemin
Publication year - 1999
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.1999.tb00011.x
Subject(s) - fipronil , biology , orthoptera , toxicology , quadrat , acrididae , persistence (discontinuity) , pesticide , zoology , botany , agronomy , geotechnical engineering , shrub , engineering
From June to Oct. 1996, cage and field experiments with Fipronil, a new insecticide from the phenyl pyrazole family, were carried out in Hanzhong basin, Shaanxi Prov. The aim was to evaluate the action mode, persistence and control value of Fipronil in rice grasshoppers management. The main results were as follows: 1 at low doses of 4 g a. i. /ha and 8 g a. i. /ha, Fipronil was found to be an effective contact and stomach pesticide against Oxya spp. The knocking effect of contact was quicker than that of stomach; 2 the residual effect of Fipronil on Oxya spp. was over 3 weeks, significantly longer than that of conventional insecticides; 3 the difference between effects of 4 g a. i. /ha and 8 g a. i. /ha was mainly shown in terms of survival time of the grasshoppers after treatment, and there was almost no difference as to control results; 4 one month after the treatment, the density of Oxya in quadrats treated by Fipronil was significantly lower than that in quadrats treated with Fenpropathoursin, and the application of Fipronil retrieved 12. 6% of rice production loss when compared with the output in control field.