Milford chronicle., 1953-07-03
News About Insects
And Plant Diseases
teontIhued from flrgt 30


trols.
Beans-Mexican bean beetle con-
tinues abundant, especially near
Milford, Georgetown and Bridge
vile. Colonies Of bean aphid were
found at Dover.
Corn-injury by grass thrips is
apparent in southern New Castle,
Kent and northern. Sussex Coun-
ties. Corn flea beetle occurs near
Vandyke. Small to full-grown corn
earworm larvae are feeding in
WhOrls at Frederick, Milford and
at many places in Sussex County;
also, early-instar southern corn
stalk bOrer and European corn
bOrer. Corn sap beetle adults are
abundant in damaged plants from
Milford southwark. Injury by corn
blotch leaf miner is common at
Frederick. Consult Late News"
tissue No. Is, June a for protec-
tive measures.
Crucifers - imported cabbage
worm is causing severe injury to
cabbage at Mt. Pleasant and Black
bird. Heavy diamondback moth
feeding, abundant small larvae of
cabbage iooper and destructive
numbers Of thrips we're observed
at the latter location.
Cucurbits - striped cucumber
beetle and garden feahopper are
active on cucumber west of Black
bird. Squash bug occurs at several
locations In Sussex County. Adults
Of squash vine borer are active
near Georgetown. See Late News"
tissue No. II, May 21) for control.
Fungieide treatments on canta-
loupes and cucumbers should begin
the week Of June 18th. For control,
use any one of the following: as
sprays, Dithale D-14 plus zinc sui
fate q quarts-% lb.), Liquid Par
zate plus zinc sulfate q quarts
x lb.), Dithane Z-7S q lbs.), Par
zabe q lbs.), or Zerlate q lbs.
or, as dusts, Zerlate (10g5, Par
zate (89o), or Dithane Z-7S (695).
Spraying is preferred to dusting.
Depending on size of plants, apply
100 to 200 gallons Of spray, or 40
to so pounds Of dust per acre.
Fruit-in most apple orchards,
where the recommended schedule
has been followed, there is still
but a trace of insect injury and
mite populations are low. First
brood cOdling moth larvae average
only half-grOwn. Likewise, in most
peach paintings, where treatments
have been applied as suggested in
Late News, damage by curculio
and oriental fruit moth is light. Fx-
cept in blocks, where special prob
lens exist, the fifth-cOver spray on
apples and the third cover sprav
on peaches can profitably be de- +
layed until July 9Th. That date.
and July goth for the following I
should meet best in
seet-contrOl needs of this season.
In the meantime, should fungicides
be required on apples, the choice
is Zineb or 406 (1-1OO) or Bordeaux
(l-S-1OO). Sulfur deposit should he
maintained on peaches. Check fire.
for possible increase in
mites; also, be ready to protect
- NAN AApAl "a bhHduSSe-DeeLle
attack by use of either DDT or
methoxychlOr at usual rates.
Potato - potato leafhopper is
abundant on untreated paintings in
kent and Sussex Counties; tin
burn and other signs Of their feed
ing are prevalent generally. Potato
fiea beetle is injurious at Smyrna
and Georgetown. Infestations of
European corn bOrer were found
west of Blackbird and near Smyr-
ma; pupatiOn is beginning. Horn
worm eggs are present and hatch
ing in Kent County. See Late
News" tissue No. IL, May 2D for
control.
Tomatoes-light infestation of
Dotato-aphid was observed near Mt.
Pleasant. Late blight has been
found in a field near Middletown:
lornWorms have appeared in the
same area. All tomatoes should he
sprayed or busted next week. For
optional treatments, see Late
News" mo. Is. June 18).