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Studies on Screening and Mechanism of Botanical Safeners of Metolachlor

Author: LiuGuoHua
Tutor: BaiLianYang
School: Hunan Agricultural University
Course: Pesticides
Keywords: metolachlor botanical safener antidotal effect mechanism
CLC: TQ457
Type: Master's thesis
Year: 2005
Downloads: 68
Quote: 0
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Abstract


Metolachlor is a highly active ,broad-spectrum pre-mergence chloroacetanilide herbicide selective corn that controls many annual grasses and certain broadleaved weeds when soil-applied. Metolachlor has very high activity in rice field. Recently, Metolachlor is successfully used for the control of weeds in transplanted rice field. But rice is extremely sensitive to metolachlor is damage to rice easily, which is limited to metolachlor used in rice serioully. Safeners can protect crop plants from herbicides injury without reducing activity in target weed species.Botanical safeners are different with chemical safeners, which come from plants, it can harmony with environment, don’t result in new pressure to environment. So, It is very important for agricultural production to study on botanical safeners of metolachlor.For that, the activity of exracts from 56 plant species were screened as herbicide safeners that protect rice from metolachlor.injury on the base of former studies.The main results is listed as followed:1.The alcohol extract from plant G have detoxified effect on metolachlor in 56 plant species, which can protect 3-days rice seedlings from metolachlor (0.5mL/L) injury. The detoxified effect of 40 g/L plant G extraction on metolachlor is the highest on the condition of different concentrations of plant extractions. The antidoted activity of plant extractions from G is different at different concentrations of metolachlor. When the concentration of metolachlor is not more than 4mL/L, The rice seedling grows well because of the protection of extracts from plant G, plant height, fresh weight are different with the treatment which no plant extractions G. The protective effect of extracts from plant G on rice is levsen with the rise of the concentration of metolachlor.2. The results of greenhouse experiment that the protective effect alcohol extract from plant G show,the alcohol extract from plant G can protect rice from

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CLC: > Industrial Technology > Chemical Industry > Pesticide Industry > Herbicide
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