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Interest in rainfall sclerotia of dimethyl digestion of cucumber leaves

Mm, measured the next day leaves digestion 82,4 ~ 84.9% of pesticides, heavy rains in the first 6 55.3 mm, measured on day 7 of pesticide disappearance leaves 97.1 ~ 99.1. Heavy rain washed the pesticides almost completely disappeared. Experiment II: 17 to 31 May the average temperature of 26.6. C, total hours of 25.2 hours of sunshine, rain date 9 days, daily rainfall from 1 to I10.5 mm, with a total rainfall of 406 mm. 3 hours after spraying 1 mm of rainfall, the next day leaves measured pesticide digestion from 17.1 to 23.7, 14.9 mm of rainfall, two days after spraying, the first 3 days measured by digestion of 87%, the first 8,10 11 heaven three torrential rains, 14 days after the digestion of Australia was 98.9 {97.3. The third experiment, 19 May to 2 June the average temperature of 0.26 .8. C, 24.4 hours of sunshine, rain date 7 days, with a total rainfall of 403 mm. 8 hours after spraying 14.9 mm of rainfall, measured the next day digestion of 78.2 ~ 78.5, the first drop too much rain llO 2 mm,[link widoczny dla zalogowanych], 3 Xie visual extinction ~ 89% 81 6 64 mm storm heaven , measured on day 7 94.3 -95.6 digestion. Third, the discussion I. Cucumber leaves, the base interest dimethyl bacteria Ministry of edge detection,[link widoczny dla zalogowanych], the concentration range of 0.47 to 200 mg / kg, large amplitude, high concentration liquid chromatography detection range of character sets, the pre-treatment with quick and easy method to detect repeatability is better, so the present study,[link widoczny dla zalogowanych], liquid chromatography gas chromatography than good. 2. Four field trials the main difference between weather conditions and bright sun in the daily rainfall distribution, rainfall and spraying the smell of the shorter interval, the greater the rainfall, the more obvious effects of rain erosion. All test results show that the correct pesticide spraying should have a day without rain in 5 to 7 days without rain or rain. Chao near the date of I10a12. 2O (on the next page 34) 1.212e \5 days, Guangxi to 58.0K, digestion curve: Zhejiang as Ct = 6.5812e \2. Biguanide Xin acetate after dipping fruit orange fruit dip in the final residue after fruit day, 3,7,12 days, the whole fruit of the determination of residues of Zhejiang in 1987 0. 2290 ~ 0.9166ppm, I988 year 0 .2166 ~ 0.7473ppm, Guangxi in 1987 was 0. 2:52 ~ 1.3O08ppm, 1988 year 0. 2483 ~ 4.1897ppm. 8. Conclusion (1) citrus growing season,[link widoczny dla zalogowanych], spraying 25% of the biguanide agent Xin acetic acid salt a 1000 times, mainly in the peel residue and soil, were not detected in the flesh. Half-life of the fruit base digestion of 6.2, -. 8.4 days, the soil was 85.0-60.5 days, the slow degradation of Pharmacy in the soil. (2) citrus after harvest to 25% of the biguanide acetate Sim 1000 times and 2000 times dip fruit processing, the day after the drug, 37,12 days, sampling determination of base fruit (peel and pulp) in the residue, Zhejiang is 0.2166 ~ 0.9166ppm, Guangxi is 0.2082 ~ 4.1597ppm. In addition to Zhejiang in 1987 points, the development of fruit the day after, 3 days, residual pulp mold detected in both samples, indicating that the agent has some internal permeability. (3) biguanide acetate on orange Xin maximum residue limits (MRL), FAO / WHO has not been provided. Japan provides that: In the summer fruit peel the maximum residue limit is 2.0ppm, the pulp is 0.2pPm. If the two dip under two years of testing, 7 days after dipping fruit, the pulp residue is not seized, peel residues of less than 2. Oppm. Therefore proposed as a standard suspense. According to Japanese reports: spraying before harvest (1,000 times) 7 days after the determination, citrus pulp, peel residues were less than 0.01ppm and 0. 48ppm. Since spraying before harvest than after harvest fruit processing residues dip lower (by climate), so the agent for spraying before harvest, post harvest storage more secure.
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