[Effect of organophosphorous insecticides on Chinese chive insect pests and their degradation by pesticide-degrading bacterium].
3.00 kg(a. i) x hm(-2) phoxin and 2.63 kg(a. i) x hm(-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) x hm(-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 x hm(-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 x hm(-2) pesticide-degrading bacterium to control Bradysia odoriphaga, the degradation rate of three concentrations of phoxin was 100%, 100% and 99.69%, respectively.
Jiang
Jiandong
J
Key Laboratory of Microbiological Engineering of Agricultural Environment, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, China. jiang_jjd@sina.com.cn
Cao
Hui
H
Zhang
Ruifu
R
Zhang
Mingxing
M
Li
Shunpeng
S
D000818:Animals; D001419:Bacteria / Q000378:metabolism*; D001673:Biodegradation, Environmental; D027782:Chive / Q000469:parasitology*; D007313:Insecta; D007306:Insecticides / Q000378:metabolism*; D008743:Methyl Parathion / Q000378:metabolism; D009943:Organophosphorus Compounds / Q000378:metabolism*; D009946:Organothiophosphorus Compounds / Q000378:metabolism; D010573:Pesticide Residues / Q000378:metabolism*
D007306:Insecticides; D009943:Organophosphorus Compounds; D009946:Organothiophosphorus Compounds; D010573:Pesticide Residues; D008743:Methyl Parathion; C003135:phoxim