JSS 1 Third Term Agricultural Science Lesson Note – Methods of Weed and Pest Control

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TOPIC:  METHODS OF WEED AND PEST CONTROL

CONTENT:  (a) characteristics of weeds;

(i) Easily dispersed

(ii) Long dormancy.

Sub–Topic 1:  Definition of weeds.

Weeds are plants growing where they are not wanted or cultivated. A plant may be weed in one farm but crop in another farm. For instance, a cowpea plant growing in a cassava plot is a weed.

Some common weeds

NAMES OF COMMON WEEDS	BOTANICAL NAMES
1.Guinea grass	Panicum maximum
2.Bahama grass	Cynodon dactylon
3.Carpet grass	Axonopus compressus
4.Elephant grass	Pennisetum purpureum
5.Spear grass	Imperata cylindrical
6.Giant star grass	Cynodon plactostachyum
7.Northern gamba	Andropogon gayanus
8. Stubborn grass	Eleusine indica
9. Southern gamba	Andropogon tectorum
10.Aspilia Africana	African marigold
11.Centro	Centrosema pubescens
12.Calopo	Calopogonium mucunoides

 

Characteristics of weeds

1. Weeds produce many seeds.
2. They can survive in adverse soil condition.

3 . They grow very fast.

 

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