Problem Insects for Your LawnMost insects are beneficial to the turf in that they aid in the decomposition of organic matter, improve soil structure and soil aeration and some are even predators of other, more harmful organisms. Nonetheless, many insects present problems for lawns and landscape plants. The following are a list of common insects that can cause problems for your lawn and landscape: Japanese Beetle & GrubThe Japanese beetle (Popillia japonica Newman) is a highly destructive plant pest of foreign origin. It was first found in the United States in a nursery in southern New Jersey nearly 80 years ago. It is very difficult to control the Japanese Beetle once they emerge. CutwormsCutworms are large, hairless surface feeding moth larvae which can destroy patches of turf. Cutworms feed at night and damage the turf by snipping plants off at ground level, hiding in thatch by day. Birds feeding extensively in a turf area may indicate a high population of cutworms. MolecricketsMole crickets feed at night during warm weather and after rain showers or irrigation. They come to the surface and feed on organic material, including grass, and other small organisms, including insects. During the day, and during periods of drought, they remain in their burrows, often for long periods of time. SodwebwormsAdult sod webworms, called lawn moths, are typical snout moths: they have sensory appendages called labial palps that extend in front of the head. The moth holds its wings close to and over its body at rest, giving it a slender appearance. When disturbed, the moth makes a short flight close to the grass. At night, these moths drop their eggs indiscriminately on to turf. The creamy larvae have a distinctive double row of brown or black spots down their backs, located at the base of long bristles. The Lucerne moth larva is somewhat larger than the other sod webworm larvae. During the day larvae reside in silk-lined burrows, writhing when disturbed. At night they emerge to feed. ArmywormsThe armyworm is a good example of a pest that can sneak up on you. When it does, the results can be disastrous. Fall armyworms can strike almost anywhere in the country and seem to have been relatively serious during the past few years. |
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