| 【Objective】 The study was to screen detoxications to phytotoxicity caused by insecticides and herbicides
on tobacco.【Method】The pot experiment was conducted to study the detoxication effects to tobacco photytoxicity. 【Result】
Microelement fertilizer had good repair effect to the phytotoxicity of methomyl and phoxim. The repair rates were 47.28%
and 54.43%, respectively after 9 days treatment. Brassinolide and amino acid fertilizer could relieve the phototoxicity of
imidacloprid . After 9 days treatment, the repair rates were 60.32% and 56.77%, respectively. Active carbon and quick lime
could repair deformity of tobacco by quinclorac. When the concentration of active carbon in soil was 80mg/kg, the repair
rate of the plant height, leaf length and leaf width were 81.44%, 76.81% and 89.59% after 30 days treatment, and the repair
rate increased with the increase of the concentration of active carbon in soil. Quick lime had the best detoxication effect on quinclorac when the concentration was 150 mg/kg in soil, but the repair rate decreased with the increase of the concentration of
quick lime . Mefenpyr-diethyl and active carbon could relieve bensulfuron-methyl’s inhibition on growth of tobacco. Active
carbon and mefenpyr-diethyl had good repairing effects on bensulfuron-methyl. Mefenpyr-diethyl had the best detoxication
effect on bensulfuron-methyl when its concentration was 4 mg/kg in soil. The repair effect decreased with the increase of the
concentration of mefenpyr-diethyl. The detoxication effect of active carbon on bensulfuron-methyl phototoxicity increased with
the increase of its concentration in soil. 【Conclusion】 Microelement fertilizer could be use to alleviate the phototoxicity of
methomyl and phoxim. Brassinolide and amino acid fertilizer could relieve the imidacloprid phototoxicity on tobacco. Active
carbon and quick lime could repair the tobacco phytotoxicity by quinclorac. Bensulfuron-methyl phototoxicity could be
alleviated by active carbon and mefenpyr-diethyl. |
