Sample Exam Questions True/False

Plant disease quarantines are designed to eliminate disease organisms from previously infested sites (true/false)

Sample Exam Questions Multiple Choice:

Potato tubers can remain dormant, even after the hormone balance becomes favorable for growth, if: a) a disease is present, b) transcription factors are present c) growing space is limited d) environmental conditions are not favorable.

Sample Exam Questions

Short Essay: A potato grower contacts you asking advice on whether or not to use cultivation for control of a late flush of weeds in a potato crop. The plants emerged 3 weeks ago and have vines more than a foot tall. Describe the plusses and minuses of cultivation at this stage of growth, give your recommendation, and provide a justification.

Sample Exam Questions

Why are weeds a problem in potatoes ?

Answer : Weeds compete with potatoes for light, nutrients, and water resulting in tuber yield and quality losses. Some weeds can directly damage tubers e.g. quackgrass rhizomes growing through tubers. Some weeds can interfere with harvest. Weeds also can serve as alternate hosts of other potato pests - insects, disease, nematodes e.g. hairy nightshade hosts potato virus Y (PVY) and green peach aphid vector.