Weeds and their control
From the
times immemorial the weeds have claimed their own share of soil fertility and productivity
to the detriment of food and other crops. Weeds are now widely regarded as pest of great
agricultural menace because they lower the Agril. Production or increase its cost or
impair the quality of the produce in various ways. They are undersirable. They not only
compete with crop plants but also interfer with Agril. Operations. Apart from this, weeds
also harbour insects, pests and diseases and provide ideal ecological conditions for their
shelter and proliferation and increase cost of diseases and pest control.
The
losses caused by weeds are more than pests and diseases. The detrimental effects of weeds
necessiates their eradication in crop land and other locations. Therefore, weed control
problem should receive better attention.
The
methods of weed control are classified into the catagories.
PRIVENTIVE
METHODS:-they are employed in advance or occurance of weed production.
CURATIVE
OR REMEDIAL MEASURES:- Those employed to tackle weed problem after they have arrived or
appeared.
PRIVENTIVE
METHODS:-are those which are employed for preventing the introduction and spread of weeds
in new areas. They are-
Use of
Clean Seeds:- Certified pure seed should be induced to use only clean seeds.
Prevention
of seed production by weeds in waste areas:- Weeds generally grow in waste lands, along
roadsides, fences or dispatches and produces seeds which are carried to adjoining
cultivated fields. Such areas should be properly controlled to prevent the formation of
weed seeds.
Avoiding
feeding screenings grain or hay containing weed :- seeds with destroying their viablilty.
Elliminate
the use of raw dung as manure untill viability of weed seeds suspected to be present is
destroyed by through formentation. As far as possible avoid movement of live stook from
infasted areas to clean area.
Farm
implements and machinaries:- Like harrow, cultivator, harvesters, seed cleaners of hay
balers should be properly cleaned before moving them from infested areas to new areas.
Prevention
of use of soil, sand etc. from infested areas.
Nursery
stock should be properly inspected for absence of seeds, tubers, rhizomes, of some of the
perennial weed.
Irrigation
channels drains should be kept free from weeds.
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Ag.
Technologies
(Weed Control)
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