. Bulletin of the Department of Agriculture. Agriculture. COTTON BOLL WEEVIL IN THE MISSISSIPPI VALLEY. 31 Table XXV.—Number of generations of the boll weevil: Maximum series on First generation: Eggs laid Generation mature Second generation: Eggs laid Generation mature Third generation: Eggs laid Generation mature Fourth generation: Eggs laid Generation mature Fifth generation: Eggs laid Generation mature Sixth generation: Eggs laid Generation mature Seventh generation: Eggs laid Generation mature Dni/s. June 22 June 23 July 9 18 July IS July 28 20 Aug. 2 Aug. 18 22 Sept. 2 Sep
. Bulletin of the Department of Agriculture. Agriculture. COTTON BOLL WEEVIL IN THE MISSISSIPPI VALLEY. 31 Table XXV.—Number of generations of the boll weevil: Maximum series on First generation: Eggs laid Generation mature Second generation: Eggs laid Generation mature Third generation: Eggs laid Generation mature Fourth generation: Eggs laid Generation mature Fifth generation: Eggs laid Generation mature Sixth generation: Eggs laid Generation mature Seventh generation: Eggs laid Generation mature Dni/s. June 22 June 23 July 9 18 July IS July 28 20 Aug. 2 Aug. 18 22 Sept. 2 Sept. 17 31 Sept. 18 Oct. 8 22 Oct. 13 At Victoria in 1913 the weevils were carried through the same pro- cedure and the same number of generations secured. However, the first hibernated females at Victoria were secured over a month earlier than those at Tallulah and the breeding continued a few days longer in the fall. In other words, the generations were sufficiently shorter at Tallulah to allow the same number to be produced in more than a month less than at Victoria. SUMMARY. In northern Louisiana the average longevity of the boll weevil adults on cotton squares was days; on bolls days; on cotton leaves , and on okra fruit , the average for these differ- ent classes of foods being days. The females live somewhat longer than the males, there being an average of days for females and for males. A number of weevils were found feeding in okra blooms in the field but attempts to cause them to breed in okra fruit in the labor- atory were unsuccessful. A number of eggs were deposited but they failed to hatch. The largest number of eggs deposited by the first generation wee- vils was 204, the average being 132. The daily maximum varied from 5 to 12. Second generation weevils showed somewhat less fecundity, the maximum oviposition being 175 eggs and the average The average period of oviposition was days, the range being 1 to 77 Plea
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