In the untreated areas, Sharkey had a 6-acre field in the center of a 
large timbered area about ); miles from Hunter's Bend and other cottonfields, 
Barnes had about 75 acres on several small farms in a timbered area along 
Highway 80 in east-central Madison Parish, Bear Lake had 60 acres on several 
small farms in a timbered area near Highway 80 in west-central Madison Parish. 
In the treated areas, laboratory personnel applied insecticides to control 
thrips and overwintered boll weevils early in the season and to kill off boll 
weevils in the fall. Late-season treatments were made by individual farmers. 
In the untreated areas, late-season treatments likewise were made by farmers, 
but boll weevils were adequately controlled on very few farms. 
Early-Season Treatments 
Early-season treatments for overwintered boll weevil control were begun 
when plants began producing squares about the size of a pinhead and were con- 
tinued at 5-day intervals until first bloom. Results are given in tables 1 
and 2 for the boll weevil populations and the boll weevil and bollworm infesta- 
tions. 
All fields at Hunter's Bend received five spray applications of 2 pounds 
of toxaphene plus 1 pound of DDT plus 0.25 pound of methyl parathion per acre 
between June 3 and July 13. The overwintered weevil population averaged 128 
per acre on June 9, and records at various intervals thereafter showed that 
good control was obtained. The infestation averaged 2-, 3-, and 8-percent 
punctured squares on July 16, 23, and 30, respectively. A bollworm (Heliothis 
zea (Boddie)) infestation developed, with square injury averaging 1 and 2 per- 
cent on July 23 and 30. Treatment for late-season bollworm-boll weevil con- 
trol was begun between July 23 and 30 and continued for the remainder of the 
production period. 
At Houston Ridge three spray applications of 0.25 pound of methyl parathion 
and two spray applications of 0.25 pound of methyl parathion plus 0.5 pound of 
DDT per acre were made between June 23 and July 12. The population averaged 
hl per acre when treatment was begun; 5 days later it had been reduced to 19, 
and no weevils were found thereafter. The infestation averaged 1- and 2-per- 
cent punctured squares on July 23 and 30, respectively. Although the boll 
weevil infestation was very low, the bollworm infestation became severe 
enough to require treatment beginning on July 26. It was continued for the 
remainder of the season, 
