Weed eradication is not economical and not feasible in large areas, however when invasive species of weeds are accidentally imported from other countries and released or herbicide-resistant weeds are detected in the environment , eradication of these weeds in affected areas is usually recommended. Discuss the possible reason.
Answers
Answer:
u can probably use a weedicide and a traditional hoe..brudah
Answer:
6.2 Weed–Crop Interactions on Smallholder Farms
Climate change will affect species dominance in different ecologies and this will determine which management practice to apply. Weeds are among the most significant biological yields reducing factors together with pests and disease and where infestations are severe yield losses as high as 90% have been recorded. Naturally weeds compete intensely with any plant and the competition is equally high among different weed species. In southern Africa there is a wide diversity of weed flora that colonizes agricultural land (both cropped land and livestock pastures). Under conditions where rainfall is limiting and temperature is unfavorable to crops. Some weed species dominate and utilize resources for vegetative and reproductive growth stages ahead of crops. Table 6.1 shows most common weed species found on arable land in southern Africa. Although absolute elimination of weeds is not necessary, the aim of the most effective management practice will be to reduce to bare minimum interference. There is a need for crop interference to be minimized, especially during the critical period of weed competition, a period where the effect of competition for resources should be least to avoid crop losses (Akobundu, 1987). This period varies with crop variety, cropping system, weed species, and climatic condition of a particular area. Climatic conditions that favor dominant weed flora development will lead to increased interference with crop growth.