The content is just an excerpt from the complete note for JSS 1 Third Term Agricultural Science Lesson Note – Methods of Weed and Pest Control. Check below to download the complete PDF
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
- Weeds produce many seeds.
- They can survive in adverse soil condition.
3 . They grow very fast.
