Studies On Three Plants' Extraction Of Antidote Acetanilide Herbicides Injury

Metolachlor and acetochlor are belong to acetanilide herbicides, they have high activity in rice field. But rice is extremely sensitive to acetanilide herbicides which damage rice easily. Botanical safeners can protect crop plants from herbicides injury , and it don't result in new pressure to environment. For that, using different methods of extracting extracted plant A, B, G which have already screened as herbicide safeners that protect rice from acetanilide herbicides injury on the base of former studies.The main results are listed as follow:1. There are four different extraction methods such as supercritical CO₂ extraction, traditional decocting, extraction method and Soxthlet extraction which used to extract plant A, B, G. The results showed that the extraction of plant G which used supercritical CO₂ extraction can protect rice from metolachlor injury, which is better than other extraction methods. The extraction of plant G protected rice from metolachlor injury is good when the concentration of plant G is 80g/L. The Soxthlet extraction method is a good method to extract plant A and B. They can protect rice from acetochlor injury when the concentration of plant A is 80g/L, the concentration ofplant B is 40g/L.2. The results of greenhouse experiment that the protective effect extracts from plant A, B, G showed, the extracts from plant G can protect rice from metolachlor injury obviously. Rice treated with extracting from plant G, which plant height and tillering are almost the same with the contrast. The extracts from plant A or B can protect rice from acetochlor injury obviously too. The spikes results showed that fertility, 1000-grain weight and yields/mu of rice is almost the same with the control when the concentration of plant G is 80g/L which used supercritical CO₂ extraction and the concentration of plant A, B is 80g/L, 40g/L which used refluxing extraction.3. Added metolachlor or acetochlor to the millet and then used the extraction of plant A, B, G ,the results showed that the extraction of plant A,B,G can not influence the control effect of millet.