"inferited" - 1 õppematerjal

Weed Management Handbook

• Biological control of weeds  Herbicides • ‘’Weedkiller’’ • Pesticides used to kill unwanted plants • Selective herbicides kill specific targets while leaving the desired crop unharmed • Non-selective herbicides kill all plant material with whichthey come in contact (used to clean waste ground, industrial sites, railways) • In the US, herbicides account for about 70% of all agricultural pesticide use  Herbicide-resistant weeds • The inferited ability of a weed to survive a rate of herbicide, which would normally result in effective control • This happens trough evolutionary process, whereby a population changes from being susceptible to being resistant- • Happens when the same herbicide has been used over a period of years • Resistance can be passed from one generation to the next  Prevention of resistance Cultural control methods • Cultivation- incession tillage can bury