Effect of organophosphorous insecticides on Chinese chive insect pests and their degradation by pesticide-degrading bacterium

Abstract

Abstract: 3.00 kg(a.i)穐m^-2 phoxin and 2.63 kg(a.i)穐m^-2 methyl parathion were respectively applied to control the Taeniothrips alliorum on Chinese chive.Compared to no pesticide treatment,the decline rate of the insect density was 98.28% and 98.39% at the 3rd day after spraying pesticides,and 89.94% and 94.04% at the 20th day after spraying pesticides,respectively.At the 3rd day after spraying 15.00,18.00 and 21.00 kg(a.i)穐m^-2 phoxin,the insect density of Bradysia odoriphaga decreased 80.77%,93.10% and 96.98%,and at the 35th day after spraying,it decreased 92.44%,95.05% and 96.81%,respectively.The application of pesticide-degrading bacterium had not any effect on controlling insect pests,but could markedly degrade pesticide.At the 3rd day after spraying 45.00 L穐m^-2 pesticide-degrading bacterium to control Taeniothrips alliorum,the degradion rate of phoxin and methyl parathion was 99.52% and 98.83%,and at the 3rd after spraying 75.00 L穐m^-2 pesticide-degrading bacterium to control Bradysia odoriphaga,the degradation rate of three concentrations of phoxin was 100%,100% and 99.69%,respectively.

Key words: Bradysia odoriphaga, Taeniothrips alliorum, Pest control, Phoxin, Methyl parathion, Bio-degradation, Pesticide-degrading bacterium

CLC Number:

JIANG Jiandong, CAO Hui, ZHANG Ruifu, ZHANG Mingxing, LI Shunpeng. Effect of organophosphorous insecticides on Chinese chive insect pests and their degradation by pesticide-degrading bacterium[J]. Chinese Journal of Applied Ecology, 2004, (8): 1459-1462.

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