. Behavior of cotton planted at different dates in weevil-control experiments in Texas and South Carolina. Boll weevil; Cotton; Cotton. 32 BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE Weevil damage to mature bolls was a minor factor as compared with damage from anthraenos,e, boll-rot, and bollworms. RATE OF SEEDLING GROWTH INCREASED BY LATER PLANTING In order to compare the rate of plant development in the four plantings, records of the formation of nodes on the main stalk were obtained from 10 representative plants in each planting. Differences in the growth rate during the seedling stage o
. Behavior of cotton planted at different dates in weevil-control experiments in Texas and South Carolina. Boll weevil; Cotton; Cotton. 32 BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE Weevil damage to mature bolls was a minor factor as compared with damage from anthraenos,e, boll-rot, and bollworms. RATE OF SEEDLING GROWTH INCREASED BY LATER PLANTING In order to compare the rate of plant development in the four plantings, records of the formation of nodes on the main stalk were obtained from 10 representative plants in each planting. Differences in the growth rate during the seedling stage of these four plantings are shown by the interval between the planting date and the date of appearance of the first square in each planting. As shown by the data in Table 19, the period from the date of planting to the appearance of the first square on the April 5 planting was 51 days, as compared with 44 days for the planting of April 16, 40 days for that of April 25, and 38 days for that of May 4. The latter planting reached the fruiting stage of development in 13 days less time than the planting made on April 5. Table 19.—Rate of nodal growth during the seedling stage of cotton grown in succes- sive plantings at Charleston on four different dates Date planted, 1923 Number of days Average date of appearance of first fruiting branch. Apr. 5. Apr. 16 Apr. 25 May 4. May 26 May 30 June 4. June 11 1 As these records were made from the planting date rather than from the date of germination, a deduction of about five or six days is necessary in comparing these figures with those that were obtained in Texas. (See Table 3.) The April 5 planting required an average of days for the development of each of the first eight nodes, as compared with days per node for the May 4 planting, a difference in growth rate of days. Higher air temperatures and warmer soil conditions dur- ing the seedling stage of growth are probably the factors causing this increased rate of growth in t
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