Title:Control of fall armyworm
Category:Crop Production
2017-06-10 07:39:57

 

Control of fall armyworm

Recognize the problem

This pest eats the maize bud, which reduces crop growth and yield. The fall armyworm acts as scraper, defoliator and cutter of maize. It affects a large number of crops but prefers maize.

Background

It enters the maize bud and from there it eats the plant. If another fall armyworm enters the same plant, the larger one eats the smaller one. Thus, the fall armyworm controls its own population. 

The pupa is normally in the soil.

Wasps, ants, spiders and several other insects eat and kill fall armyworms.

Rain frequently kills young fall armyworms.

Management

The fall armyworms in the soil can be controlled using a range of non-chemical methods, such as providing adequate fertilization to the crop.

Carefully observe your maize to check if there is significant damage. Sometimes it is not necessary to apply insecticides.

If insecticides are used, the products must be frequently changed to prevent fall armyworms from becoming accustomed to one insecticide. When they accustom to one product, the product does not affect them anymore.

The following insecticides can be used when necessary.

  • Lufenuron (larvicide-insecticide) at 10 mL per 20 L water 
  • Spinosad at 6 mL per 20 L water 

When using a pesticide, always wear protective clothing and follow the instructions on the product label, such as dosage, timing of application, and pre-harvest interval.

 

Authors: Elmer Vaca Justiniano, Raquel Pardo
Autonomous Department Government of Santa Cruz
tel: 591 3368804 email: elmervaca150@hotmail.com           Edited by Plantwise

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