Weed Collection and Identification: Principles of Crop Protection, Lab: Weed Science Ilm Sanghiron Lagaylay Instructor I
Weed Collection and Identification: Principles of Crop Protection, Lab: Weed Science Ilm Sanghiron Lagaylay Instructor I
Weed Collection and Identification: Principles of Crop Protection, Lab: Weed Science Ilm Sanghiron Lagaylay Instructor I
Identification
● beneficial/harmful to man
● characteristics that makes them unique
and difficult to control
Weeds
1. Prolific seed production: - Weeds have high reproductive
capacity especially the annual weed e.g.
Amaranthus Spp - 96 – 235, 000 Seed / Plant
Eleusine indica - 41 – 135, 000 Seed / Plant
●
Beneficial
protection against soil erosion
feed to animals (
● leafy vegetables by man
(Amaranthus viridis)
● medicinal herb
● source of pesticide
Weeds:
●
●
HARMFUL
Compete crop resources
Poisonous weeds
● Alternative host to pest and diseases
(Pennisetum purpureum is a host to stem
borer)
Based on Gross Morphology
Broadleave
Grasses Sedges s
Grasses Sedges Broadleaves
Leaf venation Parallel Parallel Broad
Root system Fibrous Fibrous taproot
Stem shape Round Triangular Woody,
herbaceous
Leaf Venation
Leaves are narrow,
Leaves are narrow,
arranged in sets of 3;
Leaves are wide, veins arranged in sets of 2;
stems are triangular in
branch out in different stems are rounded or
cross section
directions flattened
Root System
Stem shape
5. For further enhancement of your compendium, sign up and try using Canva
app (www.canva.com/education) or any editing apps you know.
A. Collection and
Identification
6. Save your data sheet and compendium of weeds using these suggested
filename formats: