. Boll weevil suppression, management, and elimination technology : proceedings of a conference, February 13-15, 1974, Memphis, Tennessee. Boll weevil, Control, Congresses. Table 4.âOviposition punctures and egg hatch in an experimental effort to eradicate an artificial infestation of the boll weevil in plots in Louisiana Observa- tion date Test plot1 Check plot1 Squares with ovi- position punctures at release site2 Hatch of eggs dis- sected from Squares with ovi- position punctures at release site2 Hatch of eggs dis- sected from No. Percent square3 (%) No. Percent square3 (%) Aug. 1-2 112 9 7
. Boll weevil suppression, management, and elimination technology : proceedings of a conference, February 13-15, 1974, Memphis, Tennessee. Boll weevil, Control, Congresses. Table 4.âOviposition punctures and egg hatch in an experimental effort to eradicate an artificial infestation of the boll weevil in plots in Louisiana Observa- tion date Test plot1 Check plot1 Squares with ovi- position punctures at release site2 Hatch of eggs dis- sected from Squares with ovi- position punctures at release site2 Hatch of eggs dis- sected from No. Percent square3 (%) No. Percent square3 (%) Aug. 1-2 112 9 7-8 181 10 15 79 0 .... 70 20-21 160 0 56 86 182 o Sept. 5 84 0 70 8 11 0 12 "289 0 19 4131 0 51,502 24 3 .9 0 Oct. 10 3 0 1,031 22 Nov. 15 «0 0 138 21 c0 0 * 1,070 1 10 gravid females placed in the test plot on July 26. 5 gra vid females placed in the August 14. Check plot sprayed October 10 and 22. 2 Release site consisted of a circle having a 25-ft radius cente red on the female release check plot on July 26 and again on plant or establishment point. 3 From 6 to 100 squares dissected each week. 4 All squares examined in 5 randomly selected 100-ft row sections in the release acre. â r' Randomly picked squares. 0 Squares on every plant in field'examined. tails of other calculations, based on the observed number of eggs laid by the original 10 gravid females, indicated that we actually had a ratio of no less than 47:1 of sterile: normal males. At the termination of the experiment, the 1-acre check field had a population of 74,000 boll wee- vils. Egg hatch in the check ranged from 70 % to 100%. Our most ambitious field experiment up to 1968, when we did the West Texas experiment, was an attempt to eradicate a natural field pop- ulation of weevils in a partially isolated area of the Cotton Belt in 1964 (Davich et al. 1967). The males were sterilized by two 15 s dips, 24 h apart, in a 2% apholate soluti
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