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Flashcards in Borers Deck (36)
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1

Tip, Trunk and Root Weevils....What are some Symptoms?

  Symptoms include:

  • Dead leaders and branch tips
  • Galleries with “chip cocoons”
  • Exit holes round
  • Root rot 

2

What is a Chip Cocoon?

Where the larvae of the white pine weevil pupate.

(Their frass is chip-like)

3

White pine weevil activity kills ________.

New Leaders

4

What characteristics do White Pine Weevils prefer in a host?

Weak plants

Stressed plants

Transplanted plants

5

Monitor spring emergence of white pine weevil with ______.

Teddars Traps

6

What kind of damage to pales weevils do?

They chew on the bark of twigs

7

Where do pales weevils lay their eggs?

In the stumps or crowns of stressed trees

8

What damage does Black Vine Weevil do?

Chews notches  in leaves.

9

What is a good insecticide to use against Black Vine Weevil adults?

how about larvae?

Merit - adults

Entomopathogenic Nematodes - larvae

10

11

What type of wasps attack oaks and cuase the plant to form galls?

cynipid wasps

12

Where and When do Boxwood Leafminers lay their eggs?

 

Leaf Tissues

Late May

13

14

How do Boxwood Leafminer larvae survive over winter?

  • Eggs hatch, then larvae mine leaf blotches into leaves and survive in the leaf mine over winter.  

15

When do Boxwood Leaf Miner adults emerge from the leaf tissue?

April and May

16

What product should you avoid using when controling boxwood leafminers? Why?

Neonicotinoids. 

They make boxwood mites worse.

17

What is the best product to use when controling boxwood leaf miners?

  • spray Avid when orange larvae are visible.

18

Where do Clearwing Moth larvae feed?

In the Cambien tissue

19

20

What is a spot ID characteristic of Family Sesiidae: 

they are moths with wings that do not have scales 

21

What is the best way to catch a lilac ash borer? why?

Pheromone trap

They fly and mate during the day so blacklight traps wont work. 

22

Lilac ash borer have what type of frass?

Pellet like frass

23

Lilac Ash Borers feed on the Cambien....then they do what?

(come up from the ground, look for a wound, eat cambien,)  then bore through the heartwood, pupate and exit out the other side.

24

management and control of lilac ash borer:

set up pheromone traps in April

 after you trap the little bastards you spray Acelypryn.

25

Where do Horntails feed?

on the Heartwood

26

What is a good Biocontrol for Lilac Ash Borer?

Entomopathogenic Nematodes

27

Repeat infestations of American Plum Borer cause what symptoms?

Loosen the bark and girdle the trees

28

How do Horntails cause damage to plants?

They carry a toxic fungus and they have toxic mucus

29

Where do Flatheaded Appletree Boreres mine? what kind if mines do they create? 

They create serpentine shaped mines in the cambiem tissue

30