IDA

Question 1

Problem posed by IDA

Answer 1

Defol. Seedlings have poor root growth (moisture stress on dry site)

Poor height growth

Predisposition to other pests

Question 2

What are the numbers in damage for IDA

Answer 2

If heavy defoliation

• no moisture stress - 15% mortality
• moisture stress - 40% mort

Question 3

What defines a M-H hazard

Answer 3

Likes burned sites and herbs. Periodic localized outbreaks.

Site: M-H hazard if burned in last year and a dry site.

Question 4

How is IDA monitored?

Answer 4

Predictive Pheremone traps in block in summer/fall

Low: no prob, Mod: ground check @ snow melt (shot holes in foliage), High: Ground check or cancel

Question 5

MGMT at planting

Answer 5

If outbreak is active, delay planting for a year.

Will reduce a years growth bout seedlings will not be available for larvae And moths will move on.

Don’t plant dry sites, could plant moist sites or plant in fall.

Question 6

Damage of IDA

Answer 6

Factors for outbreak: high pop of IDA, few herbs, fresh seedlings

damage factors: more than 60% defol, terminal bud killed, moisture stress*.(caused by dry summer, dry site, poor planting)