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If you dust, apply 1.5-percent endrin or 10- 
percent TDE dust at the rate of 8 to 15 pounds 
per acre for small plants, and 20 to 25 pounds 
per acre for large plants. Apply with hand or 
power equipment or by aircraft. If you use 
aircraft, apply 25 to 30 pounds of dust per acre. 
If you spray, mix one of the recommended in- 
secticides with water as follows: 
High-pressure ground sprayer: Use 1 to 2 
pints of a 19.5-percent endrin emulsifiable con- 
centrate, or 2 quarts of a 25-percent TDE emul- 
sifiable concentrate, or 4 pounds of a 50-percent 
TDE wettable powder with 75 to 100 gallons of 
water per acre. Note: You will need about 75 
gallons for small and medium-sized plants; 
about 100 gallons for large plants. 
Low-pressure ground sprayer: Use same 
quantity of endrin or TDE emulsifiable concen- 
trate as recommended above with about 5 gallons 
of water per acre. 
Aircraft spray equipment: Use same quantity 
of endrin or TDE as recommended above with 2 
to 5 gallons of water per acre, depending upon 
the capacity of the equipment. 
If you plan to spray with a low-pressure 
ground sprayer or with aircraft equipment, use 
an emulsifiable concentrate; a wettable powder 
may clog the nozzles of these sprayers and also 
is difficult to keep well mixed with water. 
Examine tobacco fields for hornworms when 
plants are about knee high (or smaller in late- 
planted fields). Inspect plants carefully to de- 
termine the extent of an infestation; hornworms 
blend in with the foliage and are often difficult 
to detect. 
Make the first application of insecticide when 
hornworms are too numerous to be controlled 
easily by handpicking. If you dust, make sure 
that there is little or no wind. For best results, 
dust in early morning or late afternoon when the 
air is more likely to be calm. 
