Root Feeding

Be able to name several subsurface feeders – chewing insects

White Grubs

Black Turfgrass Ataenius

Green June Beetles

Chafer

Japanese Beetle

Which insect adult is a dull gray or gray-black beetle with a long, curved

snout or bill?

Bluegrass Billbug

Which insect larvae is 1/8 to 3/8 inches, white, legless, C-shaped, soft, and

fleshy

Bluegrass Billbug

Which insects are attracted to dung, compost, decaying grass clippings, and

turf thatch

Black Turfgrass Ataenius

Which insect adults are shiny, jet black, with club-end antennae and parallel

grooves on the wing covers

Black Turfgrass Ataenius Adult

Which insect larvae have a scattered bristle pattern and a pair of pads at the tip

of the abdomen

Black Turfgrass Ataenius

What is crusial control for Black Turfgrass Ataenius

eliminating nearby piles of grass clippings

Which insect adults are a velvet green color on top, with yellow-orange
edges?

Green June Beetle Adul

How do green june beatles mainly cause damage?

Tunnelling

Which insect larvae crawl on their backs, with legs up in the air?

Green June Beetle Gru

Where do green june beetles fly relative to turf during day?

fly low during the day over turf areas.

Which insect adults are strongly attracted to lights

Chafers

Which insect larvae have no distinct raster pattern

Chafer Grub

Which insect adults feed heavily on a wide range of ornamental plants, fruit

trees, vegetables, etc.?

Japanese Beetles

Which insect adults are colored a brilliant metallic green with a row of five

white spots along the side of the abdomen and a pair of white spots on top of

the last abdominal segment?

Japanese Beetle Adult

Which insect larvae have two distinct rows of spines on the raster that

converge to form a “V”

Japanese Beetle Adult

Which insect adults are generally brownish, sometimes with a mottled pattern,

with long spindly legs?

May or June Beetle Adult

Which insect larvae have a raster pattern that consists of two parallel lines?

May or June Beetle Grub

Which insect usually takes 2 years to complete their life cycle?

May or June Beetle Life Cycle

What are the four types of chemical control applications for white grubs?

Preventive Applications

• Early Reactive Applications

• Late Season Reactive Applications

• Spring Applications

Why are preventive chemical control applications not recommended?

Occurrence is rather sporadic

VBe able to list several preventive insecticides that provide good control of

white grubs.

Merrit

Meridian

Mach 2

How long is the active soil residual period of most insecticides?

3 weeks or less

Know that early reactive applications must be used when grubs are actively

feeding. Why?

That is how the insecticide gets in them

What time of year are late season reactive applications made? How big are
grubs during this time period? How effective is control during this time
period?

early fall

Grubs are usually third instars and may

be 70 to 80 times the body weight of a

newly hatched grub.

Not good

Be able to name one insecticide that can be used as a late season reactive

application.

Sevin and Dylox

Why are spring applications often ineffective?

very large

– time for treatment is very smal

VWhat insecticides are applied as spring applications?

Sevin, dylox

CLight traps are used to sample for what beetles?

May/June beetles

How often do you monitor light traps?

Traps should be monitored 1 to 2

times/week

How many days in a row must beetle numbers drop in order to indicate that

peak emergence has occurred?

Once number of beetles drops over 7

days in a row, assume peak emergence

and oviposition has occurred

what population size of grubs can be maked with water and nutrients per sqr foot?

6 or less

water and fertilizers.

Which insect adults are notorious for their painful, burning sting that results in

a pustule and intense itching?

Fire Ants

What is a brood? What is the brood comprised of?

Cream-colored to white immature ants,

often called

The brood is comprised of the eggs,
larvae, and pupae

Name the castes of a fire ant colony.

winged males, winged

females (unmated queens), workers,

and one or more mated queens

Be able to name a few insecticides that control fire ants.

Award and top choice