ABW/Billbug

Question 1

What family is the ABW in?

Answer 1

Curculionidae

Question 2

What are some spot ID characteristics of the ABW?

Answer 2

• Robust snout (bill) with mouth at tip
• Elbowed antennae attached at snout apex
• Thorax and head regions combined are shorter thatn the abdomen

Question 3

What do you look for when deciding if the larvae is a white grub or a weevil?

Answer 3

Legs.

Weevils do not have legs

Question 4

How many Generations per year for ABW’s?

Answer 4

2 - 4

Question 5

ABW’s

1st-3rd instars (larvae) feed on ______. 4th and 5th feed on _____.

Answer 5

Stems (they’re inside the plant)

Crowns (they’re too big to be inside the plant)

Question 6

Where do adult ABW’s overwinter?

Answer 6

in the tall grass near treelines.

Question 7

define bi-modal emergence as it relates to ABW’s.

Answer 7

• “Seasonal fluctuations in temperature as well as variability in local microclimates mean adult ABW are converging from different overwintering sites at different times during the spring.”
• Microclimaates can determine emergence
  • shady areas vs sunny areas even a few yards away from eachother.
  • they can come out at different times
  • be sure to monitor multiple areas

Question 8

how do adult ABW’s feed?

Answer 8

They notch leaves and chew on crowns

Question 9

What product holds up when all others are face resistance issues for ABW’s?

Answer 9

Conserve

Question 10

What does the Forsythia plant tell us about ABW’s?

Answer 10

Forsythia is a very good predictor –

• Start of migration (FULL BLOOM)
• Peak densities = 1⁄2 Gold:1⁄2 Green:

Question 11

Curative Chemical Control for Billbugs:

Answer 11

Carbaryl (Sevin)

Question 12

How many Billbug generations per year?

Answer 12

1

2 sometimes but it is rare

Question 14

Endophyte enhanced seed is a way to help control Billbugs.

True or False

Answer 14

True