Strawberry bud
weevil (Anthonomus signatus )
Symptoms
o Cause yield losses from 50 to 100% in some
areas
o Adult female sever the strawberry bud from
the pedicel following oviposition, causing it to hang by part of the stem, or
fall to the ground , thus, preventing fruit formation.
Control:
o Topping of plants and removal of foliage and
mulch immediately following harvest, then applying a follow up chemical spray
to kill overwintering adults.
o Other cultural practices include avoiding
field site selection near wooded areas to prevent high numbers of overwintering
adults from entering the field in the spring.
Tarnished plant bug (Lygus lineolaris)
Symptoms:
o The
piercing-sucking feeding by Lygus bugs are one of the causes of irregularly-shaped,
catfaced strawberries.
o The insects damage fruit by puncturing
individual seeds; this, in turn, stops development of the berry in the area
surrounding the feeding site.
o Overwintered lygus
bugs lay eggs in weeds in January and they hatch in March.
Control:
o Weed control
should be carried out in March and early April while lygus are still nymphs.
o Application of
“Antracol” at the rate of 500gm per Acre is applied for the control.
Western flower
thrips (Frankliniella occidentalis)
Symptoms:
o Injure the plant
by grasping the plant.
o Thrips feeding on
strawberry blossoms cause the stigmas and anthers to turn brown and wither
prematurely, but not before fertilization has occurred.
o With high
populations, the surface of the berry may become cracked and discolored
CONTROL
o Minute pirate bugs
and other generalist predators can be important natural enemies of
thrips.
o Commando at the
rate of 300 to 400gm per acre is applied.
o Novastar at the
rate of 500ml per acre is applied to control Thrips.
Strawberry
leafrollers (Ancylis comptana )
Symptoms:
o Damage results
from larvae feeding on leaves and rolling the leaves by means of silk webbing.
o Leaf feeding
results in reduced runner formation, interference with ripening fruit, and
plant kill.
Control:
o In areas with a chronic
leaf roller problem, it may be feasible to remove accumulated trash in spring
around the plants with either blowers or suction devices to limit the potential
for a large population buildup.
o Actara at the rate
of 24g per acre is applied.
Strawberry fruitfly
(Drosophila melanogaster )
Symptoms:
o Attracted to very
ripe or damaged fruit in the field.
o Problem in
strawberries picked for freezing.
Control:
o Make sure that
ripe fruit are completely removed from the plants.
o When possible, shorten harvest intervals as
temperatures increase
o Practice good
sanitation in and around the field.
o Diptrex at the
rate of 100gm per acre is applied to control fruit fly.
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