Methods of Weed Control


 
 
Concept Explanation
 

Methods of Weed Control

Management of Crop Protection: Crop fields may have a large number of undesirable plants (weeds), insect pests and diseases. Various methods are:

Control of Weeds: Many undesirable plants grow along with cultivated crops. These unwanted plants are called weeds. The growth of weeds in the field is very harmful as they compete with the useful plants for minerals, water, light and space. They thus decrease the crop yield and lower the quality of foodgrains. Another disadvantage is that weeds spread crop pests and diseases by acting as alternative hosts to insects and microorganisms. Weeds some times produce poisonous substances which may affect crop growth or may poison crop produce. It is, therefore, essential to remove these weeds from time to time. Common weeds are: Amaranthus (chaulai), Chenopodium (bathua), Convolvulus (khuri), doob grass.

Methods of weed control: The process of removing weeds from a crop field is called weeding. Mechanical, biological and chemical means are adopted to control weeds.

Mechanical method: Weeds are removed manually by hand or with the help of a harrow (khurpi), hoe or rake. It is a costly affair and takes a lot of time. Weeds are also removed by tilling, mowing (cutting with a machine), burning and flooding.

Biological method: some insects or organisms are deliberately put into the crop field to destroy the weeds but do not harm the crop.

Chemical control: Chemicals used to kill weeds are called weedicides. The use of weedicides is easy, cheap and less time-consuming. Weedicides may be used as sprays or powders. Since weedicides are poisonous substances, the grains must be washed before use. Weedicides are also called herbicides

Sample Questions
(More Questions for each concept available in Login)
Question : 1

Which of the following is not a weed ?

Right Option : A
View Explanation
Explanation
Question : 2

All the plants other than crop plants are called ______________

Right Option : A
View Explanation
Explanation
Question : 3

The removal of weeds is called ____________________

Right Option : B
View Explanation
Explanation
 
Video Link - Have a look !!!
 
Language - English
 
 
 
Related Videos
Language - English
Language - English
Language - English

Language - English
Language - English
Language - English

Language - English
Language - English
Language - English



Students / Parents Reviews [10]