Ahmed, F., . EI-Fakharany, I., A. Shokr, S. (2002). PERSISTENCE OF SOME PESTICIDES IN RICE FIELDS. Journal of Plant Protection and Pathology, 27(11), 7749-7755. doi: 10.21608/jppp.2002.256023
F. A.M Ahmed; I. I. . EI-Fakharany; Sh. A. A. Shokr. "PERSISTENCE OF SOME PESTICIDES IN RICE FIELDS". Journal of Plant Protection and Pathology, 27, 11, 2002, 7749-7755. doi: 10.21608/jppp.2002.256023
Ahmed, F., . EI-Fakharany, I., A. Shokr, S. (2002). 'PERSISTENCE OF SOME PESTICIDES IN RICE FIELDS', Journal of Plant Protection and Pathology, 27(11), pp. 7749-7755. doi: 10.21608/jppp.2002.256023
Ahmed, F., . EI-Fakharany, I., A. Shokr, S. PERSISTENCE OF SOME PESTICIDES IN RICE FIELDS. Journal of Plant Protection and Pathology, 2002; 27(11): 7749-7755. doi: 10.21608/jppp.2002.256023
1Pesticide Dept. Fac. of Agric. Kafr EI-Sheikh Tanta Univ.
2Central Agric. Pesticides Lab. Agric. Res. Center, Dokki-Glza, Egypt
Abstract
The effects of treatment with pesticides on some rice yield components were studied. Results clearly indicated that carbofuran was the most effective on the weight of grain yieldlhill, weight of 1000 grain, grain yield/fed. and straw yield/hill, these values were 38.39 gm, 35.23 gm, 4.04 ton and 33.66 gm, respectively. Diazinon came after carbofuran in their effect on the yield components of rice, the weight of grain yieldlhill, weight of 1000 grain, grain yield/fed. and straw yieldlhill, were 36.99 gm, 32.80 gm, 3.85 ton and 30.05 gm, respectively. The herbicide thiobencarb was not effective on all components of rice yield except the effect on the weight of grain yieldlhill. The persistence of pesticides in rice fields under flooded conditions were studied. The residues of carbofuran in the water samples, were: 0.003, 0.034, 0.052, 0.028 and 0.020 ppm after zero time, one, two, three and four weeks of treatment, whenever these values in soil samples were: 3.231, 2.511, 1.782, 1.352, 0.971 and 0.850 ppm after zero time, one, two, three, four weeks and two months, respectively. Diazinon residues also detected in water and soil samples during the period of experiment, these values ranged from 2.203 ppm at zero time in the soil sample to 0.0004 ppm after four weeks in the water sample. The residues of thiobencarb in the rice field water were decreased from zero time 0.8647 ppm to 0.0065 ppm after 4 weeks of treatment, while these residues in the soil samples were increased from zero time to the second week and then decreased again. The residues of the tested pesticides were not detected in all samples of rice grain.
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