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Year : 2021  |  Volume : 5  |  Issue : 4  |  Page : 89-95

Evaluation of herbicidal properties of Mikania (Mikania Micrantha H.B.K) and rain tree (Samanea Saman Jacq Merr) leaf extract

1 Department of Agricultural Chemistry, Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh
2 Department of Food Technology and Engineering, Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh
3 Department of Plant Pathology, Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh

Correspondence Address:
Dr. Md Shariful Islam
Department of Agricultural Chemistry, Patuakhali Science and Technology University, Dumki, Patuakhali-8602
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/mtsp.mtsp_2_22

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Background: Uses of synthetic herbicides to control weeds have negative impacts on soil health. But botanical herbicides have little or no impacts on soil health in addition to control weeds. Aim and Objectives: The aim of the research is to develop botanical herbicides for controlling selected weeds. A pot experiment has been done to evaluate the herbicidal properties of fresh Mikania micrantha H. B. K and Samanea saman Jacq. Merr. leaf extract on two commonly grown weeds Physalis heterophylla and Chenopodium album. Four weed seedlings were transplanted in each pot and three replications were maintained for pots and twelve for each weed. Eighty percentage methanolic extract (1:1) of M. micrantha and S. saman were applied at 0, 10, and 15 mL per pot after 35 days of transplanting. Materials and Methods: Data were collected for agronomic parameters, chlorophyll contents, weed control efficiency by number and weight, and pH and Electrical conductivity (EC) of postharvest soils. About 92% C. album by number was controlled by application of 10 mL M. micrantha extract and which was 36% by weight. Maximum 58% C. album and P. heterophylla by number and 12%–16% by weight was controlled by application of 15 mL S. saman leaf extract. Chlorophyll contents (a+b) were significantly decreases in treated leaves compared to control as these plant extract causes chlorosis of weed leaves. Results: Hence, number of yellow leaves significantly increases and green leaves decreases in treated leaves. pH (7.08–7.34) and EC (0.62–0.89 dS m-1) of postharvest soil indicated that these values were not significantly change after and before application of herbicidal extract and thus no adverse effect was found on soil environment. Conclusion: Considering the weed control efficiency, it is concluded that M. micrantha leaf extract has high potentiality as botanical herbicide to control both C. album and P. heterophylla.

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