oilseed crop canola

2. Canola weeds, Identification and Mgt
By
Adil Zia
8th Semester, Class No 618
Department Of Agronomy
Aup, Amir Muhammad Khan Campus
Mardan
Presentation Topic

3. Agenda of presentation
 Canola , Brief description
 Botanical Introduction
 Edible oil and weed
 Major weed of canola
 Virtual presentation of major weed of canola
 Why weed control
 Weed management
 Integrated weed management ( IWM )

4. Canola

5. Brief Description
 Scientific name : Brassica napus L
 Kingdom : Plantae
 Family : Brassicaceae
 Genus : Brassica
 Species: Napus

6. Botanical description
 Annual rabi crop
 Tap root system
 Fruit of canola is called pod

7. Edible oil and weed
Pakistan despite being an agricultural country
spends a lot of foreign exchange on import of
edible oil. The edible oil produced in Pakistan
cannot meet the nation demand.
The consumption of edible oil has increased by 9
% and production by 2.6 % annually in the last
two decades in Pakistan (Anonymous, 2006).

8. Cont…
 Oilseed crops contribute 21% towards national oil
production. The area under canola was 28,000 hectares with
144,000 tons of oil seed and 52,000 tons of edible oil
production in 2006 (Anonymous, 2006).
 The average yield of canola in Pakistan is very low as
compared to other advanced countries. The main reason for
low yield is water shortage and weeds (Reddi and Reddi,
1995). The yield of canola is directly propotional to water
stress and weed density.

9. Major Weeds of canola
 The major weeds that infested canola crop were
reported as:
 Vicia sativa
 Convolvulus arvensis
 Rumex species
 Coronopus didymus
 Ranunculus species
 Medicago denticulata

10. continue..
 Fumaria indica
 Chenopodium species
 Poa annua
 Melilotus species
 Paspalum species
 Orobanche species
 Euphorbia helioscopia

11. Vicia sativa
 Family : papilionaceae
 English name : Common
wetch
 Vernacular name: Revari

12. Convolvulus arvensis
 Family : convolvulaceae
 English name : Green-vine
 Vernacular name: Lehli,
Baily

13. Coronopus didymus
 Family : Cruciferae
 English name : Swine cress
 Vernacular name: Gandi
booti

14. Rumex dentatus
 Family : polygonaceae
 English name : bitter dock
 Vernacular name: Jangali
palak

15. Renunculus muricatus
 Family : Renunculacea
 English name : Rough
seeded buttercup
 Vernacular name: Chambl

16. Poa annua
 Family : Poaceae
 English name : Blue grass
 Vernacular name: Poa
ghaas

17. Paspalum
paspaloides
 Family : poaceae
 English name : water grass
 Vernacular name : Narru
ghaas

18. Orbanche
aegyptiaca
 Family : Orbanchaceae
 English name : broom wort
 Vernacular name: Gidar
tambaku

19. Melilotus indica
 Family : Leguminoseae
 English name : Indian
sweet clover
 Vernacular name: senji

20. Euphorbia
helioscopia
 Family : Eupbobiaceae
 English name : Umbrella
milk weed
 Vernacular name: Cbbatri
dodhak

21. Chenopodium
species

22. From where weed
comes?
 Through agencies :
 Wind
 Water
 Grazing animals
 Food trade
 Transport

23. Control of weeds

24. Why weed control ?
 To increase yield.
 Why ?
 He has no cash.
 Needs cash for medication.
 Needs cash for children’s education.
 Needs cash to purchase inputs.
 Cannot use weedicide because of cash problem.

25. WEED MANAGEMENT
 Weed Management refers to how weeds are
manipulated so that do not interfere with the
growth, development and economic yield of
crops and animals. It encompasses all
aspects of weed control, prevention and
modification in the crop habitat that interfere
with weed ability to adapt to its environment.

26. METHOD OF WEED MANAGEMENT
 i Cultural
 ii Biological
 iii Chemical
 iv Integrated

27. Weed preventation
 Weed prevention: This refers to the exclusion of a particular weed problem from the
system that has not experienced that weed problem. It involves those measures
necessary to prevent the introduction of new weed species into a given geographical
area as well as the multiplication and spread of existing weed species.
 It includes the following:
 Fallowing
 Preventing weeds from setting seeds
 Use of clean crop seed for planting
 Use of clean machinery
 Controlling the movement of livestock

28. Cultural weed
management
 Cultural weed management is defined as
any practice or effort adopted by the
farmer in crop production which
minimizes weed interference problem.

29. continue
• Cultural weed methods include:
• Hand weeding
• Mechanical weeding
• Mulching
• Crop Rotation
• Tillage
• Burning
• Flooding

30. Biological weed management
 Biological weed management refers to the use of
biological agent – pest, predators, pathogen and
parasites to control weeds.
 It involves the control or suppression of weeds
through the action of one or more organisms by
natural means, or by manipulation of the weeds,
organism or environment.

31. Chemical weed
Control
 Chemicals that are used for killing
weeds or suppress the plant growth
are called herbicides. The practice of
killing the undersirable vegetation
(that is weeds) with herbicide is called
chemical weed control.

32. Integrated weed
management
 Integrated weed management (IWM) refers to the system of
combining 2 or more weed management systems at low input level
to keep weed interference in a given cropping system below
economic threshold level. It combines 2 or more weed management
systems at low inputs to obtain a level of weed suppression superior
to that ordinarily obtained when one weed management system is
used.
 IWM may involve combinations of cultural plus chemical, cultural
plus biological, cultural plus preventive, biological plus chemical or
combinations of three or more of these systems.

33. Presentation is Over
Thank you for your participation !!