30732 research outputs found
Sort by
Evaluation of Xpert MTB/RIF Ultra performance for pulmonarytuberculosis diagnosis on smear-negative respiratory samplesin a French centre
Ahmad Nawaz, Muhammad Sarfraz, Muhammad Sarwar, and Muhammad Farooq
Allelopathy is a naturally occurring ecological phenomenon in which the livingorganisms produce and release the biochemicals (allelochemicals) in the environmentthat affect the growth, development, reproduction, and survival of otherliving organisms in the surrounding environment. For field crops, the phenomenonof allelopathy can be exploited in the form of intercropping, use ofcover crops, mulching, crop rotations, and use of plant water extracts alone orin combination with reduced doses of herbicides to provide effective controlof the agricultural pests and diseases. For the control of insect pests (field andstorage insect pests), the use of allelopathic plant water extracts and the powderof allelopathic plants may be quite useful. The allelochemicals affect thegrowth of unwanted plants (e.g., weeds) through changes in the cell structure,inhibition of cell elongation/division, disruption of membrane structures, anddisruption of water and nutrient uptake and the process of photosynthesis. Thephenomenon of allelopathy is eco-friendly, and it may help significantly reducethe usage of pesticides. Thus, the phenomenon of allelopathy provides an attractiveecological alternative to pesticides for controlling the pests and diseases ofthe agricultural crops. In this chapter, we have discussed the mechanismof allelochemicals for growth inhibition in plants and the role of crop rotation,allelopathic mulches, allelopathic cover crops, intercrops, and allelopathic waterextracts (alone or with reduced doses of herbicides) in weed management. Therole of allopathic water extracts and allelopathic powders for managing the insectpests and diseases has also been described