【摘要】 通过两年两地的田间试验,残留分析,并参照联合国粮农组织和世界卫生组织的有关最高残留限量的规定,提出了50%异菌脲可湿性粉剂防治番茄早疫病安全合理使用技术指标的建议,常用剂量1000倍液,喷施3～5次,最高使用剂量500倍液,喷施3～5次,每隔10d喷施1次,安全间隔期为3d.更多还原

【Abstract】 Through field experiments for two years and in two areas and through residue analysis,and in the light of standerds of maximum residue limit of agricultural chemical (or tomato recommended by Food and Agricultural Organization of the United Nations and World Health Organization, the technical indices of safe and rational application of Rovral ( 50WP) for controlling tomato Alternaria solani were suggested. The common dosage is 1000-fold formulated solution,and the maximum dosage is 500-fol’d solution. The solution is sprayed 3 - 5 times and the interval between every two times is 10 days. The safety interval time is 3 clays.更多还原