Roll No.
Total No. of Questions : 09
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Total No. of Pages : 02
B.Sc. Agriculture (2014 & Onwards) (Sem.-7)
WEED MANAGEMENT
Subject Code : BSAG-CS 703
M.Code: 74830
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Time: 3 Hrs.
Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
- Write short notes on :
- Drift reduction agents
- Herbicide isomers
- Additives
- Active ingredient of pesticide formulation
- Allelopathy
- Persistence of weeds
- Emulsifiable concentrates
- Adjuvants
- Synergists
- Control measure of Cynodon dactylon
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SECTION-B
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- Discuss the principles of post-emergence herbicides.
- Explain the allelopathic effects of weeds on maize, sorghum, wheat and sunflower.
- Explain the common weed dispersal agents.
- Discuss the classification of herbicides.
- Briefly explain the compatibility of herbicides with other agrochemicals (additive, synergistic, antagonistic, independent and enhancement effect).
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SECTION-C
- Explain in detail the biological and integrated weed management practices.
- Discuss the various methods of herbicide application along with advantages.
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- Explain the concept of crop weed association and competition.
- Discuss the critical period of weed competition along with the factors affecting the competitive ability of crops against weeds.
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Sc Agriculture Last 10 Years 2010-2020 Previous Question Papers || Punjab Technical University