Foliar application

i. Blanket spray

• It is the uniform application of herbicides to standing crops without considering the location of the crop. Only highly selective herbicides are used here.
• Spraying 2,4-Ethyl Ester to rice three weeks after transplanting

ii. Directed spray

• It is the application of herbicides on weeds in between rows of crops by directing the spray only on weeds avoiding the crop.
• This could be possible by use of protective shield or hood. For example, spraying glyphosate in between rows of tapioca using hood to control Cyperus rotundus

iii. Protected spray

• It is a method of applying non-selective herbicides on weeds by covering the crops which are wide spaced with polyethylene covers etc.
• This is expensive and laborious. However, farmers are using this technique for spraying glyphosate to control weeds in jasmine, cassava, and banana.

iv. Spot treatment

• It is usually done on small areas having serious weed infestation to kill it and to prevent its spread. Rope wick applicator and Herbicide glove are useful here.