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DDT had little or no direct effeot on this mite, but by its 
drastic action on the mite's enemies, it encouraged outbreaks of this 
mite in the plots sprayed with DDT for codling moth control. --Ross 
(306). 
Dormant miscible oil containing 5.12 ounces of DDT per 100 
gallons controlled the hatching and development of this mite to some 
degree as compared with untreated checks, but was definitely inferior 
to a tar-petroleum blend miscible oil. Applied as a summer spray, 2 
ounces of DDT per 100 gallons when used with emulsive summer oil at 
3 quarts per 100, did not appear to permit build up of initially 
strong mite infestation, as DDT seems to have done when used without 
oil. The effectiveness of summer oil did not seem to be notioeably 
impaired by DDT.— Cleveland ( 114 ). 
In the 1944 season in New Hampshire complete control of the European 
red mite on apples was obtained with a delayed dormant application of 
1 gallon of Niagara No. 6 dormant oil plus 2 pounds of Gesarol AK-20 to 
each 100 gallons* of spray. This compared favorably with the recommend- 
ed spray of 3 gallons of oil to 100 gallons. However, sinoe none of the 
plots reoeived an application of 1-peroent oil alone, one cannot oonolude 
that the DDT was actually responsible for the degree of control obtained. 
— Conklin (116). 
Development of mites was oonspicuous on the foliage of all trees 
sprayed with DDT in oodling moth experiments. Bronzing of leaves was 
much in evidenoe.— Hough (217 , 218) . 
DDT was absolutely no good*— Hutson (220 ) • 
At certain dosages in the range required for effective codling 
moth oontrol DDT is very toxic to important predators of the European 
red mite and common red spider. Under favorable weather conditions mite 
populations have built up in record breaking time in DDT-sprayed plots 
to extremely destructive levels.— Steiner et al. (534) . 
Tetranychus atlanticus McG., a red spider 
There was no apparent control on small cotton plants lightly in- 
fested and dusted with a 3-peroent DDT dust (A-3) at the rate of 25 
to 30 pounds per acre.— Smith (324) . 
Tetranychus bimaculatus Harvey, the two-spotted mite 
Two-spotted mites increased in numbers when treated with eight 
applications of 5 percent DDT in light summer spray oil— •average about 
l/2 gallon per acre— made by hand atomizer from June 6 to August 1.- 
Gray (188). 
