St. John's Wort Hypericum perforatum L.

Agrilus hyperici
(Creutzer)

DESCRIPTION: Beetle - 4 to 5 mm elongate brown with metallic purple or green sheen
BACKGROUND LIFE CYCLE
Availability Habitat Adult Emergence Egg Laying Larva Development F1 Adult Life Span Over Winters
N Warm dry habitat large stemmed host plant July July near base of living stems Tunnel down stem to root   70 days In root
ATTACK COLLECTION NOTES
Stage Damage Life Stage Method Quick search and capture as beetles are prone to flight. B.C. is its northern limit.
Larvae-Stem and root miningAdults late June through JulySweep net

Aphis chloris
(Koch)

DESCRIPTION: Aphid - 1 to 2 mm
BACKGROUND LIFE CYCLE
Availability Habitat Adult Emergence Egg Laying Larva Development F1 Adult Life Span Over Winters
N Not defined. Variables in habitat produce several forms of this aphid April and May produces wingless females Base of flowering stems     Not known Egg on base of flowering stem
ATTACK COLLECTION NOTES
Stage Damage Life Stage Method Transport to release a.s.a.p. as aphids require living plant to feed on.
Adult-Suck plant fluids from stem and root crownAdults in mid summerClip infested plant material

Aplocera plagiata
L.

DESCRIPTION: Moth - 35 mm mottled brown
BACKGROUND LIFE CYCLE
Availability Habitat Adult Emergence Egg Laying Larva Development F1 Adult Life Span Over Winters
G Dry rocky open sandy and limestone regions Early summer Early summer on plant Larvae feed on foliage summer and fall Unknown emergence Not known Larvae
ATTACK COLLECTION NOTES
Stage Damage Life Stage Method Adapted to both low and high temperature extremes.
Larvae-Defoliates plantAdults-summer and fallSweep net

Chrysolina hyperici
(Forster)

DESCRIPTION: Beetle - 4 to 5 mm metallic bronze green
BACKGROUND LIFE CYCLE
Availability Habitat Adult Emergence Egg Laying Larva Development F1 Adult Life Span Over Winters
G Cool moist summers, cold winters without snow cover, but does not do well in shade Early June In fall, on basal foliage Nocturnally feed on shoot tips, basal and developing leaves Some hatch in fall though most do so in spring Not known Adults and eggs
ATTACK COLLECTION NOTES
Stage Damage Life Stage Method Overwintering adults lay large numbers of eggs in spring. More tolerant of cooler, wet summers.
Adults -Flower buds, terminal leavesAdults early to mid JuneSweep net
Larvae -Shoot tips

Chrysolina quadrigemina
(Suffrain)

DESCRIPTION: Beetle - 7 mm metallic bronze blue green or purple
BACKGROUND LIFE CYCLE
Availability Habitat Adult Emergence Egg Laying Larva Development F1 Adult Life Span Over Winters
G Most abundant in Mediterranean type climates June In fall, on basal foliage Nocturnally feed on shoot tips, basal and developing leaves Some hatch in fall though most do so in spring Not known Adults and eggs
ATTACK COLLECTION NOTES
Stage Damage Life Stage Method May frosts of -10C without snow cover will kill all surviving larvae and adults.
Adults -Flower buds, terminal leavesAdults early to mid JuneSweep net
Larvae -Shoot tips

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