Liu Zhensheng ̄, Lin Haibo. Rcsidue and Fate of DDT in Subtropical Paddy Rice[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 1995,34(4):59-63.
Liu Zhensheng ̄, Lin Haibo. Rcsidue and Fate of DDT in Subtropical Paddy Rice[J]. Acta Scientiarum Naturalium Universitatis SunYatseni, 1995,34(4):59-63.DOI:
The Residue and fate of DDT in paddy rice of subtropical environment were studied byradionuclear tracing. The results obtained were as follows:Loss rate of DDT was rapidly underthe subtropical agroecosystem in Guangzhou
Using normal spray dosage in agroecosystem
DDTresidue in spikes of paddy rice is not over the trace standard( 7 mg/kg)
The DDT residue was2. 1 mg/kg in rice bran
1.8 mg/kg in grain residue was 5. 8 mg/kg in rice bran
4.5 mg/kg ingrain of rice when applicated three times at tillering stage
booting stage and filling stage
It main-lv exists in stems and leaves.Therefore
using normal spray dosage 1000 mg/kg DDT of 15 daysbefore harvesting stage in subtropical crops is safe.