July 21, 2021

CANOLA QUIZ – Grasshoppers

Grasshoppers are often worse in hot, dry conditions. One big reason is because insects, as cold-blooded creatures, eat more and grow faster in hot weather. This quiz is about grasshopper management.

1. Grasshopper thresholds for canola are 7 to 12 per square metre. The new Pests & Predators Field Guide says to count the immature grasshoppers when counting for thresholds. Why do we prefer to manage grasshoppers as nymphs, if possible?
2. While grasshoppers tend to prefer cereals, they will eat a range of crops, including canola and pulses. What two scouting tips does the new Pests & Predators Field Guide recommend as a start point for grasshopper scouting? (Choose the two.)
3. The next four questions are a "Mix and Match". We have four major pest species of grasshopper on the Prairies. Can you identify the nymphs of all four species, starting with this one?

4. What species is this? (This shows two colour phases of the same species.)

5. What species is this?

6. What species is this?

7. Finally, what is going on in this photo?


 

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