Hey! Content is protected. You can share this page via the share button 😊
Course Content
Concept of weed
0/9
Introduction
Definitions of weeds
Characteristics of weeds
Classification of weeds
Economic importance of weed and losses caused by weeds
Ecology of weed
Weed Seedbank and Seed Dormancy
Seed dormancy as survival mechanism
Persistence of weed
Crop-weed association, Allelopathy and Competition
0/8
Introduction
Crop weed competition
Allelopathic Effect of Weeds on Crops
Factors influencing allelopathy
Mechanism of action of allelochemicals
Losses Caused by Weeds
Factors Affecting Competitive Ability of Crops against Weeds
Critical period of weed competition
Concept of weed management
0/11
Introduction
Principles of weed control
Mechanical method of weed control
Merits and Demerits of Mechanical Method
Physical method of weed control
Cultural weed control
Merits and demerits of cultural method
Biological method of weed control
Chemical method of weed control in field crops
Integrated weed management practices in major field crops
IWM of Cuscuta in Lucerne
Herbicides
0/8
Introduction
Classification of herbicides
Herbicide formulation
Methods of Herbicide Application
Soil application of herbicides
Foliar application
Factors Affecting the Efficacy of Herbicides
Environmental and health concern about herbicide: resistance and persistence in soil, effect on environment, precautions and safety measures in applying herbicides
Resources for revisions
0/1
Identification of weeds
Master Principles and Practices of Weed Management – Notes, Case Studies & Practical Insights – with Rahul

Herbicide formulation

Objectives in herbicide formulations

  • Ease of handling
  • High controlled activity on the target plants

Need for preparing herbicide formulation

  • To have a product with physical properties suitable for use in a variety of types of application equipment and conditions.
  • To prepare a product which is effective and economically feasible to use
  • To prepare a product which is suitable for storage under local conditions

 

Types of formulation

i. Emulsifiable concentrates (EC): A concentrated herbicide formulation containing organic solvent and adjuvants to facilitate emulsification with water eg., Butachlor

ii. Wettable powders (WP): A herbicide is absorbed by an inert carrier together with an added surface acting agent. The material is finely ground so that it may form a suspension when agitated with a required volume of water eg., Atrazine

iii. Granules (G): The inert material (carrier) is given a granular shape and the herbicide (active ingredient) is mixed with sand, clay, vermiculite, finely ground plant parts (ground corn cobs) as carrier material. eg. Alachlor granules.

iv. Water soluble concentrates (WSC): eg. Paraquat

Previous
Next
Home Courses + Research Blog
Scroll to Top