Other damaging insects Part 2

Question 1

vine leaf roller

Answer 1

Byctiscus betulae

Question 2

Discuss the lifecycle of the byctiscus betulae (5)

Answer 2

• One generation per year.
• They spend the winter as adults in the soil.
• They come out of hibernation in may/june.
• The female rolls the leaf and deposits 30-40 eggs
• On the rolled leaf the young larvae are formed and they leave in mid july and sink into the ground where they pupate

Question 3

Hemiptera has been split into two categories, what are they and what is the difference?

Answer 3

1. Heteroptera (Different wings)
2. Homoptera (uniform wings)

Question 4

Describe the wings of Heteroptera

Answer 4

Front wings are leather and membranous at the tip with hind wings that are membranous

Question 5

Describe the wings of homoptera

Answer 5

They either have leathery or membranous wings, never both

Question 6

Hemiptera should really be split into four categories what are they?

Answer 6

1. Auchenorrhyncha (focus on this one)
2. Sternorrhyncha (focus on this one)
3. Coleorrhyncha
4. Heteroptera

Question 7

Leafhopper is of…

Answer 7

Auchenorrhyncha and is called Empoasca vitis

Question 8

Damage of empoasca vitis

Answer 8

It is a phloem sucker and makes the leaf look like its been burnt on its edges

Question 9

Another type of leaf hopper is called

Answer 9

Zygina rhamni (3 generations) causes the leaf to fleck and slivering they are mesophyll feeders