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Coreidae 
Anasa tristis (Deg.), the squash bug 
Adults and nymphs were very effectively controlled in replicated 
plots established in heavily infested commercial plantings by 5 peroent 
of DOT alone and in combination with 6 peroent of yellow oopper oxide •— 
Granovsky ( 187 ) . 
A 3-percent DDT dust was effective up to about half-grown bugs; a 
10-percent dust controlled adults but injured the plants.— Has em an (205 ) . 
Not controlled by a D 1 ^ aerosol.— Ditman (133) * 
In small field tests in California, only 12 adult squash bugs sur- 
vived 13 days after the last of two applications of a 10-percent DDT 
dust mixture. In comparable untreated plots the survivors included 221 
adults, 20 eggs, and 7 nymphs .-^White (373) • 
In a small-soale test in a greenhouse 4 ounces of DDT in powder 
suspension per 100 imperial gallons of water was only moderately effec- 
tive, killing 55 percent of the nymphs within 4 days*— Ross ( 306 ) • 
A 3-peroent DDT dust that had no value as an ovioide killed 32 per- 
oent of the young nymphs in 2 days but oaused no knookdown of adults in 
cage tests*— Janes ( 22 6) . 
Laboratory tests with a 3-peroent dust gave 68 peroent control in 
48 hours. Nymphs are more susoeptible than adults. — Okla. Agr. Expt. 
Sta. (278), 
This bug was kept completely under control when Gesarol A-3 dust 
was applied at 3- to 5-week intervals. This dust increased the growth 
of yellow summer crook neck, scallop or pattie pan, and zuohini squashes. 
—Parker (287) . 
A test was conducted in the field on mature squash plants already 
severely damaged by a heavy infestation of half-grown and older nymphs 
and adults; hence the number present was not known. Dasts containing 
1, 2, and 3 percent of DDT and a sprey containing 1 pound of DDT in 100 
gallons of water were applied. At the end of 24 hours both adults and 
nymphs were still active in all treatments. After 48 hours very few 
bugs were seen; careful examination 72 hours after the application show- 
ed large numbers killed by each treatment, but a few nymphs and adults 
survived each one, the largest number of each stage being in the cage 
reoeiving the spray*— Lyle (24 9) • 
Applications of 3-percent DDT dust to heavily infested squash plants 
caused nymphs of ali sites to emerge from under leaves. These nymphs 
