Download cut worm damage12/7/2023 ![]() ![]() Mix a little brown sugar to increase intake of insecticide by larvae. Sprays are more effective than granules.Pheromone trapping Pheromone traps which are commercially available are very effective in knowing the activity of the adults.Other predators are ladybird beetles and insectivorous birds (Drongo Dicrurus adsimilis).Spiders prey on adults, especially the hunting spiders.Virus infection by NPV is rampant at the larval stage. Big wasps and tachinid flies kill larvae.Reducing application of nitrogenous fertilizer lessens their attack.Cutting tops of bundled seedlings prior to transplanting removes eggmasses.Handpicking of egg masses and larvae reduces their population.Flooding of nursery beds and stubbles prevents larvae migration and reduces survival.Young seedlings in seedbeds away from large areas of weeds are less prone to larval attack.Plowing of all fallow land exposes dormant pupae to desiccation and beneficial organisms (predators).Susceptible growth stages are from seedling to ripening. The older larvae are night-feeders and are usually found in the soil around the base of the plants. Newly hatched larvae usually feed together on the leaf surface. Young rice plants are often cut at ground level while older plants are only defoliated. Armyworms are usually abundant in rice crops grown after a long dry spell.ĭamage: Larva is the damaging stage. Lowland fields also occasionally suffer damage when the larvae move from one field to another. They live in all rice environments, but are serious in upland rice as the pest needs dry soil for pupation. Larvae come in various colors, ranging from creamy white to green or dark purple, with or without stripes. They become active at night and emerge from the ground. Larvae are soil-dwelling or hide underground to avoid predation by birds. The hind wings are whitish, narrowly banded along the outer margin. The adult moth has dark purplish brown forewings with numerous spots and light-colored lines. ![]()
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