DEPARTMENT OF AGRICULTURE 47

3-4 pints in enough water to cover an acre, or endrin emulsi-
fiable concentrate (1.6) pounds actual per gallon with 1-2
pints in enough water to cover an acre. Materials for the
all-purpose spray for one acre 3-4 pints 25% TDE (DDD)
emulsifiable concentrate or 2-3 pounds of 50% wettable powder
mixed with one pound of parathion wettable powder or 1/2
pint 42% parathion emulsion. Aeroplane dusting requires the
higher poundage rate for best results. Good applications of
materials for the control of budworm or hornworm will con-
trol either or both of these pests. By starting in time these
pests are controlled more easily and at less cost.
 Aphids: (Green peach Aphid). (See figure 26) This pest
has only recently proved damaging to tobacco and it has oc-
curred spasmodically every year since 1948. One measure of
control that is very helpful in preventing them to build up and
spread over the entire field is to dust the seedlings while
they are still in the plant bed. Many infestations have been
traced from the plant bed to the field. To control these pests,
1-2% parathion is recommended. It may not be necessary to
spray or dust more than once or twice to give control of aphids.

Insect Material Amount
Aphids
(plant lice)
 1% parathion dust 10 to 30 lbs./Acre
 or 1 lb. 15% or equiva-
 15% parathion wettable lent in 100 gallons of
 water
 4 or 5% malathion dust 10 to 30 lbs./Acre
 or
 25% malathion wettable 4 lbs. 25% in 100
 powder gallons of water
 or
 50% malathion emul- 2 pints in 100 gallons
 sifiable concentrate of water
 At present there are commercial dusts sold to farmers where
several insecticides are mixed together as all purpose dust.
It is well to remember that certain concentrations of these
dusts are necessary to give control and this is very important
when purchasing a dust. On the average these dusts have been
very successful; however, if only one of these insecticides are