PEST MANAGEMENT DECISION GUIDE: GREEN LIST
Fall armyworm on rice
- Avoid late or off-season planting and dont plant new crop near infested fields
- Avoid staggered planting (planting at different dates in the same field), as this provides a continous source of food for the pest
- Use of fertilizers for rice plants to be vigorous and able to compensate for damage done and apply at the right time
- Use short maturing rice varieties that are less preferred by the fall armyworm to escape the pest infestation that might occur later in the season
- Establish your seedbeds far from large areas of weeds
- Reduce larval infestations by effective management of nearby grasses. Remove weeds from areas outside of fields and plough all fallow land
- Conserve shelters and flowering plants on the edges for beneficial insects such as predators and parasitoids
- Rapid disposal of rice residues after harvest
- Sample plants every 10 feet along a line across the field and repeat this process in a second and third area, paying close attention to the crop margins
- Caterpillars: light green to dark brown with longitudinal stripes. Dark head with an upside down pale Y-shaped marking on the front. The second-to-last body segment has four dark spots forming a square (3rd instar and above)
- After germination of seedlings, scout fields weekly for larvae on plants and whether the problem is widespread or confined to certain areas or edges.
- Fall armyworm are more likely to be a problem in late-planted fields and in fields surrounded by pasture.
- Fall armyworm will feed initially on the foliage, then move to spikelets within the panicles, therefore they should also be monitored
- Use a pheromone with the Universal Bucket Trap to estimate adult moth population
- On small-scale farms, hit or shake the foliage to make the fall armyworm larvae drop into the water and drown in paddy rice
- In paddy rice, flood infested fields for a few hours to kill the armyworm larvae.
- Use microbial biopesticides based on bacteria, fungi and viruses if available
CREATED/UPDATED: April 2018
PRODUCED BY: Plantwise
©CAB International. Published under a CC-BY-SA 4.0 licence.