4 Flashcards
(56 cards)
Is the Gypsy Moth a complete defoliator or a nest maker?
Complete Defoliator
when do Gypsy Moths ley eggs?
When do they hatch?
Late Summer
Spring (mid May)
describe the colored spots on gypsy moth larvae…
5 sets of blue spots and 6 sets of red spots
what are some natural controls for Gypsy moth?
- There is a virus that can kill the larvae
- Fungi can kill larvae
- Parasitic Wasp lays eggs on pupae and the pupae never turn into adults
Do female gypsy moths fly?
No
Managing and Controling Gypsy moths:
What can you use against young larvae?
Bacillus thuringiensis or Horticultural oils
What is the threshold for gypsy moths?
10 per tree…per 250 acres
what are some options to control gypsy moths if the larvae are mature?
- Spinosad, azadiractin, tebufenozide, chlorantraniliprole
By lookng at the Prolegs…how can you tell that it’s a caterpillar?
Caterpillars have 5 or less pairs of prolegs
Where do orange striped Oakworm pupate?
On the ground
What are the hooks on the caterpillars prolegs called?
Crotchets
How many generations per year for gypsy moths?
for Orange Striped Oakworm?
1
2
Eastern Tent Caterpillar egg masses look like _____.
Black Knots on twigs/branches
Eastern Tent Caterpillars Feed during the day…where do they go at night?
- back to their “tent” that they built in the crotch of the tree branches
If you find the easter tent caterpillar egg cases early, what do you do?
Prune them out and remove them from the site
What uses silk to built tents over entire branches?
Fall Webworms
When do bagworm eggs hatch?
June
describe the characteristics of the bag that barworms make:
- They make the bag from silk and parts of the host plant
- The bag is very mobile
Where are bagworm bags found on the host?
on the tips of branches and on the sunny side of the plant
Sawfly
Order:_____
Suborder:______
Order: Hymenoptera (wasp)
Suborder: Symphyta (sawfly)
Why is a sawfly called a sawfly?
Female sawflys have ‘saw-like” ovipositors that cut open host plant tissue to lay eggs inside of it
How can you tell butterfly larvae from sawfly larvae?
- Butterfly larvae have fake eye spotsand it’s hard to tell the front and back apart.
- Sawfly larvae’s head is obvious and eyes are visible
- 6+ pairs of prolegs (enough to spell S.A.W.F.L.Y)
European Pine Sawfly prefer what kind of needles?
Old needles, they leave the new growth alone
