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Explain the chemical methods of controlling pests.

Explain the chemical methods of controlling pests.

Answers

Kavungya
Timely planting to escape pest attack.
Timely harvesting.
Proper tillage.
Close season: this is the period when a susceptible crop is not grown in order to control a certain pest.
Trap cropping: These are crops which attract pests diverting them from the main crop. The trap crop is grown together with the main crop.
Crop rotation: It breaks the life cycle of the pest.
Planting resistant varieties: These are plants with natural protective mechanisms against pest for example hairy cotton against jassid bugs, goose necked sorghum against birds, high tillering in sorghum against shoot fly.
Field hygiene: This includes rogueing and removal of crop residues which harbour pests from field.
Alterations of environmental conditions, such as, creating a microclimate which is not conducive to pests for example open pruning in coffee.
Crop nutrition: application of fertilizers and manures to make the crop strong and able to escape pest attacks.
Destruction of alternate hosts, for example, weeds like mallow which harbour cotton stainers.
Use of clean planting materials. This helps to prevent introduction of crop pests.
Proper spacing: if well spaced some pests find it difficult to move from one plant to another.
Use of organic manure, for example, farmyard manure discourages eel worms (nematodes). Chemical Control
Chemicals used to control pests are known as pesticides.
Pesticides are administered through dusting, spraying or fumigating.
Kavungya answered the question on April 26, 2019 at 08:57

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