Allelopathic potential of 73 weed species in Pakistan

Abstract

This study represents the comprehensive screening of allelopathic activity of weeds in Pakistan by applying sandwich and dish pack methods. The source for existing research of weed control towards classifying the potent organic compounds for controlling weeds in crops is the screening of large quantities of plants. Strong allelopathic weeds species have been acknowledged from analysis to provide direction for further research. Under laboratory conditions 73 weeds species were examined for their allelopathic potentials through latest bioassay activity evaluation techniques. The research information generated from the present work can be used as a benchmark for future research on the allelochemical identification and characterization. During the follow up work of present endeavor; methanolic leaf extracts of strongest allelopathic species shall be tested for antioxidant activities on crops pathogens and will also be recommended as allelopathic cover crop for biological control of weeds to support agro-environment conservation. In Pakistan, the allelopathic activity evaluation of plants through bioassay techniques is quite rare. There is a dire need to develop a complete data base of plants having strong allelopathic potential through application of these latest techniques.

Allelopathic potential of green manure, cover crops, mulching plants, and weeds found in tea plantations

“…The highest phytotoxicity was seen in the weeds used in this study. These harmful weeds may contain powerful phytotoxic compounds that could be used in the development of herbicides (Khan et al, 2019). However, allelopathic active plants, C. spectabilis, S. sesban, D. cordata, H. javanica, and O. barrelieri were not used for the field trials due to the unavailability of a bulk quantity of plant materials.…”

The alkaloids of Lupinus mutabilis Sweet. and its use in the weed control

“…Over the past 40 years, the use of chemicals in agriculture has far surpassed other methods within integrated management, becoming the main tool for weed control in most areas. However, as a consequence of the indiscriminate use of these substances, herbicide-resistant weeds germplasms are constantly increasing, leaving some farmers not only with crop losses, but with few options to fight weeds (Khan et al, 2019). Based on a better understanding of weed biology and ecology, the development of new weed management products and technology can lead to more sustainable weed control strategies (Westwood et al 2018).…”