= SQ= 
236 farms ond ranches. Out of the 10,014 acres of croton destroyed, 
5,324 acres was in ranch country and i ,090 acres in cultivated toreags 
4 , 345 acres contained a medium-to-heavy stand, and 5,169 acres a 
scattered-to-licht stand. The project involved a total expenditure 
of. $9,493.52--$1,144.37 for rentals of mowers, rakes, and teams and 
$3,349.35 for labor. he average cost of the mowed area, including 
the cost of mowing machines, rakes, teams, and drivers, was $1.30 per 
acre, while the hand-picked area cost $.87 per acre. Although the 
total acreage of croton destroyed (10, 014) is very close to the orig- 
inal estimated acreage to be destroyed (9,850), the final figures do 
not represent or include quite all of the lands or areas in croton 
that were at first listed to be destroyed." 
A larger acreage of croton was found in the cultivated areas 
than was expected, which, so far as known, was all destroyed, but ~ 
approxinately 3,175 acres of croton in the ranch country was not 
cleaned. The ranch section is the farthest removed from cultivated 
areas and was left until the last. The entire Olivia area, an 
isolated section across the bay, was cleaned, This includes about 
100 acres in Jackson County, which was cleaned by volunteer workmen 
of the community after the C WA work was terminated. It is believed 
that sufficient territory was cleaned and that the destruction was 
thorough sigh to determine the value of this cultural control 
practice in reducing flea hopper infestation in cotton during the 
coming season, Excellent cooperation was given by the local farmers 
and the »usiness men and the workers were efficient and interested in 
doing a thorough job. 
Investigations on pink bollworm control with insecticides. —- 
¥, A. Fenton, A. J. Chapman, W. L. Owen; Jr.) and’ L7 CmPitep ae 
Presidio, Tex,, have reported on a series of insecticide tests for 
pink bollworm control conducted last season. Recognizing the import— 
ance of boll coverage in attempts to contre the first-instar larvae 
ag they enter the bolls, tests showed that the best boll cover- 
ge was obtained with hand dust guns when the nozzle was held near 
fe middle of the plants and the row dusted from both sides, though 
this method did not give complete coverage. The results obtained by 
previous workers on the high natural mortality of young larvae were 
confirmed and under optimum conditions in the laboratory 78. 42 per- 
cent of the larvae died before entering the bolls. Very little is 
known concerning theeffect of insecticides on the pink bollworn; 
therefore tests were conducted in the laboratory and in the field to 
determine the effect on the mortality of larvae before they enter 
the bolls; in the field and laboratory to determine effects on moths 
and oviposition; and in dusted petri dishes to determine the contact 

