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such an extent that the plants turned yellow and died prematurely. Only 
slight and insignificant populations developed on the cryolite-treated 
plants and still fewer on the untreated plots* Before the mite popula- 
tion "began to develop, however, DDT-treated plants appeared to have a 
healthier, greener color than the other plants*— Tate et al* (342) * 
A 3-peroent DDT dust was not effective in controlling red spiders 
on strawberries.— talker (366 )* 
Mites on guayule were readily controlled with emulsions containing 
0*15 to 0*3 percent of DDT •—Craighead and Brown (125) • 
Bartlett pear trees developed a rather heavy infestation of spider 
mite with considerable foliage injury showing at -the time of the fifth 
oover spray* The injury appeared just as severe in the DDT plots as in 
the lead arsenate plots* An application of DN-111 was made the day 
following the fifth cover* Good oontrol of the mites resulted and no 
injury followed*— Childs and Robinson (111) * 
On apple and peach trees sprayed with DDT for control of the codling 
moth and the oriental fruit moth there was a tendency toward a 
build-up of red mites, and in some cases it was serious enough to require 
special sprays*— N* J* Agr* i&cpt* Sta* (275 ) > 
In plots at Tallulah, La*, and Brownsville, Tex*, dusted with DDT 
red spiders were increased somewhat by the treatment but did not become 
sufficiently abundant to cause damage*— Loft in (24 7) * 
Trombioulidae 
According to unpublished information from McCullooh working on 
DDT against trombiculid larvae in New Guinea, freshly impregnated gar- 
ments protect man from attack, but after these garments are washed some 
larval mites succeed in attaching themselves and bite after the third 
wash* Larvae allowed to run on oloth freshly impregnated with 1*5 per- 
cent of DDT were paralyzed in about 30 minutes* After the oloth had 
been washed twice in cold water the time was 120 minutes*— Buxton (100 )* 
DDT is of no use as an acarioide*— Simpson (320) « 
