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24
Jun

Eradication method for Weed Management

 1. Destroying or removing a weed completely from a crop, an area, or a geographic region. 

2. This is accomplished through eliminating the living plants and by exterminating the seeds in the soil, usually by burning or applying by soil sterilants. 

 

24
Jun

Preventive method for Weed Management

 
1.Refers to not allowing a weed from becoming a problem by adopting measures such as sanitation, quarantine and cultural methods. This is one of the most important control methods, for controlling the   weedy rice.
 
2.The use of good quality rice seeds is one of the easiest ways to reduce the weed infestations. Weeds have been reported to move from one continent to another along with the seed.  Weeds are observed to move from one fie
24
Jun

Methods of Weed Management

 Different methods of weed management are

1.  Preventive

2.  Eradication:  

3.  Control/suppression

 

24
Jun

Economic Weed Management

1.  Weed management means to reduce the weed population to a level where their presence has no negative effect on the areas of economic use. There are different ways to control weeds. The use of combination methods chosen will depend on the kind and amount of control needed. 

2. The most important principle is to resort to weed control only when it is absolutely necessary.  In other words, mere presence of weeds should not be taken very seriously unless they cause economi

24
Jun

Critical Period of Weed Competition / Nutrient Losses

1. The most critical period for competition between rice and weeds is when the rice plants are  in the vegetative phase and the yield components of the rice plant are being determined. 
 
2. Worldwide yield losses attributed to weeds average approximately 10%, while on individual fields, losses may range from 40 to 90 per cent. Competition varies widely from situation to situation and from culture to culture. 
 
3. Short weeds
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