STRAWBERRY ROOT WEEVIL (Brachyrhinus ovatus).
This is much like the
black vine weevil, but the adult is a little smaller, about 1/4 inch
long, and nearly black. It is a serious pest not only on strawberries but
on young evergreens, arborvitae, hemlock, and Japanese yew particularly,
in nurseries. Grubs eat young roots, girdle larger roots. Small hemlocks
can be killed by larval feeding, but the damage from adults is not impor-
tant. Arborvitae, on the other hand, suffer little from grubs but have
their twigs girdled by adults with foliage yellowing and dying. Strawberries are stunted, leaves closely bunched together and deeply colored,
fine roots and crown are eaten. This weevil winters primarily as a grub,
sometimes as a pupa or adult.
Control. Soil treatments with either chlordane or lindane are effective,
but the latter may give an off-flavor to strawberries.
WHITE-PINE WEEVIL (Pissodes strobi).
When you drive through the country and see the tops of white pines brown, you can be almost sure
the white-pine weevil has been at work boring into the terminal shoot.
Yellow footless grubs, 1/3 inch, work in the bark and sapwood. Adult
beetles are reddish to dark brown, somewhat mottled with brown and
white scales, and with a long snout. They hibernate in trash, feed in
May, and lay eggs in bark of the leader.
Control. Cut off the infested terminal as soon as noticed, cutting well
below the riddled portion. Tie a lateral branch up to a pole to make a
There are many other weevils that can be bothersome. The small,
grayish imported long horn weevil with its long antennae feeds on many
plants. I sometimes find privet leaves crenulated by the privet weevil,
and Iily-of-the-valley almost always has its old foliage notched in from
the edge by weevils The cocklebur billbug is a red weevil with black
spots and a long curved snout feeding sometimes on dahlia and chrysanthemum. It can be controlled with DDT.
Whiteflies are small sucking insects of the order Homoptera, family
Aleyrodidae, which means "like flour." Adults look like miniature white
moths, snow-white from the waxy powder on their 2 pairs of wings. They
may be present on underside of leaves in unsuspected hordes until they
are disturbed and fly out in clouds. Whiteflies are abundant in warm
climates and in greenhouses, and sometimes a nuisance in northern gardens on ageratum, tomatoes, and other plants started in greenhouses and
on white azaleas, gourds, and other cucurbits. Eggs laid on underside of
leaves hatch into pale-yellow 6-legged crawlers which move around for a
time then stick in their beaks and settle down just like scale insects. The
nymphs lose their legs, turn pale green, and look like very flat, oval scales.