In the third program, fields at Bear Lake and Barnes received early-season 
plus late-season treatments in 1961. At Bear Lake, Guthion at 0.25 pound per 
acre was applied four times from June 7 to July 20 and Guthion plus DDT five 
times from August through September. At Barnes, Guthion at 0.35 pound per acre 
was applied four times from June 29 through July 12 and Guthion plus DDT five 
times from August 15 through September. In the untreated check at Barnes the 
cotton was inadequately treated. 
The most effective program was the one used at Bear Lake and Barnes, 
where late-season treatment followed early-season treatment. The next most 
effective program was at Hunter's Bend and Houston Ridge, where treatment 
made the previous fall was followed by late-season treatment beginning in 
July. The least effective program was at Quebec, where only late-season 
treatment was used. 
Table 7.—Comparative boll weevil infestations in 1961 in communities 
receiving various treatments in 1960 and 1961, Tallulah, La. 
Percent punctured a an week of — 
Treatment and an September 
community I Se eee eee 
1960 fall plus 1961 
late-season treat- 
ments : 
Hunter's Bend----- 16 = 12 3} a a 12 
Houston Ridge----- 12 15 a2 
ISVEISEISS ire Hike Ooo eee hs Se 12 
1961 late-season 
treatment: 
Quebec ------------ 3} O 
1961 early-season 
plus late-season 
treatments: 
Bear Lake--------- al h 
Barnes ------------ os i aa 22 
Average—-----—-- on areas B 
Untreated: 
Barnes —=—=—-—————— 
Barly-season treatments with Guthion at 0.25 pound per acre were applied 
four times at 5-day intervals from June 9 to July 12 at Barnes and four times 
at 7-day intervals from June 7 to July 1) at Bear Lake. 
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