hairy chinch bug, considered somewhat more damaging to eastern lawns,
has short wings, but the chinch bug has wings extending to the tip of the
abdomen (Figure 16). Nymphs and adults start sucking at the base of
grass blades as soon as the ground warms up in June, staying in the
sunny areas. The grass turns brown in patches, the center often having
a reddish cast with the outer portions yellowish. The roots stay firm in
the soil; the grass cannot be rolled back like a carpet as when browning
is due to Japanese beetle grubs.
The best way to choose between fungus brown patch and chinch bug
injury is to actually see the bugs. You have to practically lie on the lawn,
part the grass blades, and gaze steadily at the soil for a few minutes. The
nymphs take 30 to 40 days to mature; the adults live 20 to 30 days, laying
eggs for the second brood, which appears in August (in New Jersey) and
continues as long as the weather is warm.
Control. Treat the soil with chlordane (5 pounds of a 5% dust to 1000
square feet) or with DDT (6 pounds of a 10% dust) or use a proprietary mixture of the two.
There are many species, but they all have dark, rather
spiny larvae (nymphs) and adults with beautiful wings veined like
lace. They all suck from the underside of leaves, staining it with brown,
varnished excrement (an excellent diagnostic sign), and they all cause a
stippling of the upper leaf surface due to loss of sap at the points where
the bugs suck underneath. We think of lace bugs particularly in connection with azaleas and rhododendrons not realizing they are the cause of
many shade trees, oaks and sycamores especially, losing their color in
ANDROMEDA LACE BUG (Stephamtis globulifera).
This is a Japanese importation that came into the news as a pest of Japanese andromeda
(Pieris) only in the past year or two, although I saw it on Long Island,
in Westchester, and in Connecticut several years earlier without realizing
it was a new species. During 1952 it has become well established in New
Jersey. The adult is about the same size as the rhododendron lace bug
but has darker bands across the wings. Nymphs are present in great numbers underneath the leaves, and their sucking turns the leaves grayish, the
whole shrub looking most unhappy. If the leaves are yellowish, mites
may be the cause. Eggs winter along the midribs, hatching in early May.
There are several generations with an immense build-up by late summer
unless control measures are used.