Other harmful Insects to grapveines

Question 1

Eulia

Answer 1

Argyrotaenia ljungiana

Question 2

How many generations for Argyrotaenia lijungiana?

Answer 2

1-2 generations, adults in April/May and June/July. Overwintering occurs in the pupal stage

Question 3

What are Microlepidoptera?

Answer 3

They are leaf mines and the larvae of lepidopter. They can tunnel in two ways: Mining on the upper surface or bilateral mining

Question 4

What are the three main leaf mining larvae?

Answer 4

1. Antispila oinophylla
2. Holocacista rivillei
3. Phyllocnistis vitegenella

Question 5

Answer 5

Phyllocnistis vitegenella (River pattern)

Question 6

Answer 6

Antispila oinophylla (blob pattern)

Question 7

Answer 7

Holocacista rivillei (Blob with a tail pattern)

Question 8

What is a Coleoptera that has larvae that eat leaves?

Answer 8

Popillia japonica, the presence of these white hair tufts is quite distinctive

Question 9

How do we monitor for popilla japonica?

Answer 9

We use green/yellow traps with food attractants and sex pheromones

Question 10

What can be a biological control for popilla japonica?

Answer 10

Nematoda Mermithidae

Question 11

Popilla japonica is…

Answer 11

Priority Quarantine Pests

Question 12

What is a quarantine pest

Answer 12

A pest of potential economic importance to the area endangered thereby and not yet present there, or present but not widely distributed and being officially controlled

Question 13

Because popilla japonica is a quarantine pest we must do 4 things

Answer 13

1. Pesticide treatment is necessary
2. We must use nets for infestations
3. Reduce irrigation as much as possible
4. Use fungi or parasitic nematodes

Question 14

In the order of Diptera what is the pest we need to watch out for most?

Answer 14

Drosophila suzuki aka Cherry Vinegar Fly

Question 15

How many times can drosophila suzuki reproduce in a year?

Answer 15

13 times

Question 16

How does drosophila suzuki damage vineyards?

Answer 16

The damage is due to the oviposition of the female on the grape and to the feeding activity of the larvae. Host range can be a huge variety of fruit

Question 17

What kinds of grapes are more resistant?

Answer 17

berries with a firm and elastic skin and consistent pulp resulted less susceptible