Insects 2 Flashcards
When should you monitor for annual bluegrass weevils?
Begin in April
Name 3 native scarabid pests.
- May/June Beetle
- Green June Beetle
- Masked Chafer
- Black Turfgrass Ataenius
What is Beauvaria?
Entomopathogenic fungi
Describe grub injury to turf:
Scattered, irregular patches of thinning and/or dead turf
How can you effectively time insecticide treatments?
- GDD’s
- Plant Phenology
- Monitoring and Record Keeping
Compare viviparous vs oviparous:
- Oviparous - lays eggs
- Viviparous - gives birth to live young
How do you calculate degree days?
• Start dates vary from February to March
• Calculate degree-day (DD) units for each day
– min 40°, max 70° [(40 + 70)/2] - 50 = 5.
• Add up average DD units (no negative values!) for
each day = DD accumulation
Name a True Bug that is a predator of turf insect pests.
describe the two type of insect communication and how they differ.
- Interspecific means they communicate between species, Can be a defense strategy
- Intraspecific means they communicate within their species find find a mate and find food.
What is an Elytra?
Sclerotized wing
What cultural problem in turf is beneficial for chinch bugs?
Thatch Accumulation
Where would you first notice Greenbug damage?
In heat sink areas
What is lamellate club?
It’s a type of Antanae…
(looks like a hand with fingers)
Compare Annual Bluegrass Weevils (Hyperodes) and Billbug Adults.
- ABW’s -
- Antanae at the apex of the snout
- Broad snout
- head and thorax are shorten than Billbug
- Billbug
- Narrow Snout
- Antanae at base of snout
- Head and Thorax same length as abdomen
