Cookies on Plantwise Knowledge Bank

Like most websites we use cookies. This is to ensure that we give you the best experience possible.


Continuing to use means you agree to our use of cookies. If you would like to, you can learn more about the cookies we use.

Plantwise Knowledge Bank

Your search results


Fall armyworm on maize

Spodoptera frugiperda
  • Avoid late planting. Plant early to avoid peak immigration of adults
  • Remove and destroy all crop residues after harvest
  • Plough the soil deeply to bury the larvae and pupae in the soil
  • Regularly weed the field and surroundings
  • Ensure optimum fertilization. Recommended fertilizer rates (4 bags or 200kg of NPK 15:15:15 per ha) to increase the growth vigour
  • Remove volunteer crops and alternative hosts to reduce carryover of larvae
  • Rotate with non-host crops (e.g. Cassava, Yam)
  • Intercropping maize with cowpea, pigeon pea, cassava.
  • Start monitoring for presence of the pest or symptoms 2 weeks after emergence
  • Look for cream or grey egg masses on the stem, lower and upper parts of leaves
  • Check for light green to dark brown larvae with three thin yellowish white stripes down the back and a distinct white inverted "Y" on head
  • Check the whorl for larvae covered with a plug of yellowish brown frass
  • Look for patches of small shot holes "window pane" in the leaves emerging from the whorl
  • Monitor damage on 10 consecutive plants in 10 randomly selected sites. Take control measures if >20% of plants are infested with larvae
  • At tassel/silk stage, do not spray anymore
  • On small-scale farms, handpick and destroy the egg masses and larvae
  • Put a handful of sand (mixed with lime or ash), sawdust or soil in the whorl of the attacked plants to kill the larvae
  • When using a pesticide or botanical, always wear protective clothing and follow the instructions on the product label.
  • Do not use chemicals with the same mode of action three successive applications as this can lead to resistance.
  • Always consult the most recent list of registered pesticides of MOFA, Ghana.
  • For recommended synthetic insecticides (Contact any District/Regional Dept. of Agric. for advice).
  • Apply Maltodextrin Eradicoat
  • WHO class U (Unlikely to present acute hazard). Apply 50ml/15lt water. REI and PHI is 0. Apply weekly based on monitoring result. Ensure good coverage of the foliage
  • Apply biopesticides: Bacillus thuringiensis products (e.g. Agoo Bypel1) and Beauveria sp
  • WHO class U (Unlikely to present acute hazard). Apply at three weeks intervals @ 50g (1 sachet)/15lt water based on monitoring result. REI is 3hrs. Ensure good coverage of the foliage
  • Apply Azadirachtin (e.g. Nemazaal)
  • WHO class U (Unlikely to present acute hazard). Apply 60-80ml per 15 litre knapsack. REI is 3 hrs. Apply weekly based on monitoring result. Spray late afternoon 4-6:00pm. Ensure good coverage of the foliage
  • Apply ethyl palmitate+ethyl oleate+elcosen (e.g Adepa)
  • WHO class U ( Unlikely to present acute hazard) Apply 100ml/15lt water at three weeks interval. REI is 24hours. Ensure good coverage of the foliage
AUTHOR(S): Patrick Beseh (PPRSD, MOFA)

CREATED/UPDATED: December 2016/March 2018
PRODUCED BY: Plantwise

©CAB International. Published under a CC-BY-SA 4.0 licence.