1. T.Y.BSc SEMESTER V HORTICULTURE UNIT :IV GARDEN OPERATIONS
By Mr. Vinodkumar Kushwaha
Department of Botany
SATISH PRADHAN DNYANASADHANA COLLEGE, THANE (W)

2. Weeding

3. Weeding :
A weed is plant growing in a place where it is not wanted.
Removal of weed from cultivated areas is called weeding.
Weeds decrease the growth and marketable yields of crops bcoz
they use same quantities of CO2 , H2O.
E.g. for weeds
Cyperus Phyllanthus Physalis

4. Characters of weeds : Weeds seeds are highly viable.
It germinate much faster than the cultivated ones.
They have special structure like Spine , dirty smell etc.
They have high reproductive capacity.
They flower earlier, maturity than main crops
It propagated veg.

5. 1.Types of weeds based on life cycle Annuals2.
Biennials 3.
Perennials
2.Based of cotyledon character
Broad leaf weeds
Narrow leaf weeds

6. Damages caused by weeds:
Competition : for nutrients, water, light
Seed quality: lowered by weeds seeds
Machinery: Machines get damaged by weeds
Poisonous plants:
Pest & diseases
Drainage
Tidiness

7. Weeding 1.Mechanical 2.Cultural 3.Chemicals 4.Biological
Weeding is done when the weeds are young . The method include

8. 2.Cultural methods : Mechanical Methods: a) Mulching b) Hoeing
a) Hand pulling
2.Cultural methods :
a) Mulching
b) Hoeing
c) Digging
d)Crop rotation

9. 3. Chemicals Methods : 4. Biological Methods Phenols
Chlorobenzoic acids
Aliphatic acids
Triazines
Triazoles
4. Biological Methods
Micro herbicides

10. Thank you…….