![]() Egg laying may be concentrated at certain sites with favorable soil texture, slope, and orientation, producing ‘egg beds.’ Relatively dry soils, undisturbed by tillage or irrigations, are preferred. Differential grasshopper.Īll grasshoppers lay their eggs in soil, in the form of tight clustered pods. Furthermore, grasshoppers may incidentally damage shelterbelt plantings when they rest on twigs and gnaw on bark, sometimes causing small branches to die back. However, during outbreak years even these may be damaged. ![]() Grasshoppers less commonly feed on leaves of trees and shrubs. Squash, peas, and tomatoes (leaves, not fruit) are among the plants that tend to be avoided. However, others will readily feed on garden and landscape plants (Table 1).Īmong vegetable crops certain plants are favored, such as lettuce, carrots, beans, sweet corn, and onions. Other grasshoppers restrict their feeding to plants of no great economic value and a few even feed primarily on weed species (e.g., snakeweed). Some primarily feed on grasses or sedges, while others prefer broadleaved plants. Over 100 species of grasshoppers occur in Colorado and their food habits vary. Problems tend to increase beginning in early summer and can persist until hard frosts. For many reasons, grasshopper populations fluctuate greatly from year to year, and may cause serious damage during periodic outbreaks. They also are among those most difficult to control, since they are highly mobile. Grasshoppers can be the most noticeable and damaging insects to yards and fields. During periods when local outbreaks are developing, control usually involves using sprays or baits.There are over 100 species of grasshoppers in Colorado.All grasshoppers lay their eggs in soil.Grasshoppers are the most difficult insect to control because they are highly mobile.
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