. Behavior of cotton planted at different dates in weevil-control experiments in Texas and South Carolina. Boll weevil; Cotton; Cotton. 16 BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE SHEDDING OF SQUARES FROM WEEVIL INJURY As previously stated, the first indication of weevil infestation after the removal of squares and the application of poison was noted during; the last week in June. The progress of the infestation is shown by records of weevil damage during the period from June 25 to July 31. These records were obtained by counting the number of weevil-punctured squares that were shed duri
. Behavior of cotton planted at different dates in weevil-control experiments in Texas and South Carolina. Boll weevil; Cotton; Cotton. 16 BULLETIN 1320, U. S. DEPARTMENT OF AGRICULTURE SHEDDING OF SQUARES FROM WEEVIL INJURY As previously stated, the first indication of weevil infestation after the removal of squares and the application of poison was noted during; the last week in June. The progress of the infestation is shown by records of weevil damage during the period from June 25 to July 31. These records were obtained by counting the number of weevil-punctured squares that were shed during 2-day intervals from a 50-foot section of a row in each block of each planting. These data are graphically shown in Figure 6. the total number of shed squares from the two blocks in each planting being combined in each curve. â 300 SO 30 70 60 SO u 40\â - g JO\ â %20\ S /o\ââ: §200\ ' J 90 lâ. PZ/?AA7Z& /?/>/?/£. 24 PZ/?AVr£5> AZ4y A2. + 27 29 A 3 5 7 S AA A3 AS A7 AS 2A 23 25 27 2S 3A ^/UAA£ c/^Z/ Fig. 6.âNumber of weevil-shed, squares from two 50-foot sections of rows in each planting of cotton zx S;n Antonio, Tex. The first weevil-shed squares in the April 19 planting were found on June 29 and in each of the three later plantings by July 7. The first planting showed a higher rate of square shedding during the first half of July, but the extent of weevil damage in all plantings was practically the same by the 19th of that month. The number of squares shed from the first planting decreased after this date, but increased very rapidly in each of the later plantings. This abrupt shift in the extent of shedding is due to the fact that there were more squares on plants in the later plantings during the last hah of July. It is probable that the absence of squares on the early plants resulted in a concentration of weevils on the later plant- ings. This condition of heavy weevil infestation in the late-planted. Please note that these images are extracte
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