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Grasshoppers in desert grasslands

Grasshoppers in desert grasslands. Weather: Direct and Indirect Effects on Grasshoppers. Grasshopper population dynamics are determined primarily by weather However, weather impact varies with latitude. Weather: Direct and Indirect Effects. Slower development

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Grasshoppers in desert grasslands

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  1. Grasshoppers in desert grasslands

  2. Weather: Direct and Indirect Effects on Grasshoppers • Grasshopper population dynamics are determined primarily by weather • However, weather impact varies with latitude

  3. Weather: Direct and Indirect Effects • Slower development • More susceptible to diseases and natural enemies • Higher mortality • Less eggs produced Less damaging

  4. Weather: Direct and Indirect Effects • Faster development • Less susceptible to diseases and natural enemies • Lower mortality • More eggs produced More damaging

  5. In the Northern Great Plains, summer temperatures appear to be critical for successful grasshopper development • Outbreaks in MT and WY usually occur after several consecutive years of drought and above-average summer temperatures • In the desert grasslands of NM and AR the situation is different • Grasshopper populations increase after above-average spring precipitation, followed by hot and dry summer

  6. Favorable conditions for pest grasshoppers in New Mexico desert grasslands • Mild autumn for egg-laying • Cool wet winter for good spring plant growth • Dry warm spring for grasshopper nymphal development

  7. Main Grasshopper Species Pallidwinged grasshopper

  8. Main Grasshopper Species Cream grasshopper Cibolacris parviceps

  9. Main Grasshopper Species Creosotebush grasshopper

  10. Main Grasshopper Species Arid spurthroated grasshopper

  11. Main Grasshopper Species Migratory grasshopper

  12. Main Grasshopper Species Packard grasshopper

  13. Main Grasshopper Species Spottedwinged grasshopper

  14. Main Grasshopper Species Clearwinged grasshopper

  15. Main Grasshopper Species Bigheaded grasshopper

  16. Main Grasshopper Species Whitewhiskered grasshopper

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