By Scout Nelson
The recent outbreak of fall armyworms has left many pastures and alfalfa fields damaged, leading producers to wonder whether their forage will recover. Fortunately, most established grasses can regrow if their crowns and growing points remain undamaged. However, recovery may take time, and reduced growth could lead to more weeds in spring.
Alfalfa fields face higher risks. Established stands typically recover if there’s enough time before frost, but late-season defoliation stresses plants and increases the risk of winterkill. Young alfalfa plantings, however, can be completely destroyed and often require reseeding in the following spring.
The best management strategy after an infestation is to allow fields to rest and recover. Avoid grazing or cutting until sufficient regrowth occurs. For hayfields, mowing can help remove larvae' food sources and stimulate regrowth, but care must be taken since armyworms may continue feeding cut forage until it dries. In severe infestations, interseeding legumes like clover can help restore productivity and balance forage composition.
In addition to pasture recovery, proper hay storage is vital during fall and winter. Hay stored outdoors is at risk of losing up to 25% of its nutrients due to rain, snow, and wind exposure. To minimize these losses, space-round bales for air circulation and store them on well-drained ground. Avoid stacking or placing bales end-to-end where moisture can become trapped.
Placing bales in north-south rows helps reduce snow drifts and encourages even drying from sunlight and wind exposure. Using crushed rock, pallets, or railroad ties can keep bales elevated and prevent moisture from seeping in from the ground.
By managing armyworm recovery carefully and applying proper hay storage methods, producers can maintain forage quality, support livestock nutrition, and ensure long-term pasture resilience and productivity.
Photo Credit:gettyimages-ianchrisgraham
Categories: Nebraska, Crops, Hay & Forage, Weather