1927 - Hinds, W. E. Notes on the biology and habits of the Peruvian cotton square 



weevil. Ent. Soc. Amer. Ann. Rpt. 20(2):251-254. 



Anthonomus vestitus has a much lower reproductive capacity than A. grandis 

 Boh., with which its habits are compared, and it is believed to be a much less 

 serious pest than the latter. 



1928 - Anonymous. Instrucciones para combatir el picudo del algodon, Anthonomus 



grandis, el picudo de la para, Epecaerus cognatur , la hormiga arriera, Atta 

 ferveus . (Instructions for combating the cotton boll weevil, the potato weevil 

 and the leaf- cutting ant). 



Bol. Divulg, Oficina Defensa Agric. Sec. Agric. Fom. Nos. 5-7: 6 p., 3 fig; 

 6 p., 5 fig; 15 p., 10 fig., San Jacinato, D. F., Mex. 



These are popular pamphlets on the bionomics and control of the insects 

 mentioned in the title, all of which are serious pests in Mexico. 



1928 - Fenton, F. A., and E. W. Dunnam. Dispersal of the cotton boll weevil ( A. 

 grandis , Boh.). Agr. Res. J. 36(2):135- 149. 



The behavior of A . grandis Boh. differs considerably during the summer 

 flight period, compared with earlier in the year. This phase of bionomics 

 of the weevil was studied during 1924 and 1925. The beginning of the flight period 

 was about 5 weeks earlier in 1925 than in the previous year. Flight is earlier 

 in the more heavily infested fields, the tendency being to leave these for those 

 that are less heavily infested. The weevils become restless and take wing when 

 the percentage of infestation reaches a certain point (not yet determined). More 

 males were caught on the screens than females. Though the weevils may fly 

 when the maximum temperature is between 60° and 80°F., the most favorable 

 conditions are between 80° and 100°F. The temperature, however, is of 

 secondary importance and acts only after the stimulus to flight has been aroused. 



1928 - Grossman, E. F. Florida longevity records of the cotton boll weevil. Fla. Ent. 

 12(4):57-59, 2 ref. Dec. Gainesville. 



Of 4,000 adults of Anthonomus grandis placed without food in a hibernation 

 cage inNovember 1927, the emergence of which was observed from March 1 

 until August 8, 1928, 11.24%, or 562 weevils, emerged--the last on July 16, 

 after having spent 2 75 days without food in the hibernation cage. In order to 

 determine the number of days that weevils could live after hibernating, all those 

 emerging after June 14 were provided with fresh cotton squares and placed 

 individually in lantern globes kept in an insectary under approximately normal 

 conditions. Longevity records show that one of these weevils lived 143 days 

 after emergence from hibernation and another lived a total of 372 days (238 in 

 hibernation and 134 afterwards.) 



1928 - Grossman, E. F. Resumption of egg-laying by hibernated cotton boll weevils 

 ( Anthonomus grandis Boh.). Fla. Ent. 12(3):33-38, 3 ref. Sept. Gainesville. 



In order to be sure that the weevils used had not previously fed on squares, 

 individuals emerging from hibernation were chosen. There was a marked 

 difference in the egg-laying activities of females fed on lower (fully developed) 

 and terminal (growing) leaves and comparatively little difference in the activ- 

 ities of those fed on terminal leaves or squares. 



The terminal leaves and squares were analyzed for a comparison of ether 

 extracts, total nitrogen, and carbohydrate content, and the results indicate that 

 no great significance can be attached to the chemical difference with regard to 

 egg-laying. Weevils fed on the lower leaves and then on squares deposited their 

 first egg 4 days after feeding on the latter. This was also the time required by 

 weevils feeding on squares without a previous diet of leaves. Weevils first fed 

 on terminal leaves deposited their first eggs within 24 hours after feeding on 

 squares, so that it may be assumed that if any vitamin is in question, it occurs 

 both in the terminal leaves and the squares. 



It is suggested that egg-laying depends chiefly on concentrations of diet. 

 Fully grown leaves apparently meet the requirements for life but not for 



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