252 EXPERIMENT STATION RECORD. 



It appears from these observations that in many varieties of American up- 

 land cotton proliferation takes place in 51 per cent of the cases of weevil at- 

 tack upon squares and in 55 per cent of those upon bolls. The increased rate 

 of mortality among weevils as a result of this proliferation was found to be 

 13.5 per cent in squares and 6.3 per cent in bolls. Climatic conditions appear 

 to have little effect upon proliferation, and all varieties of American upland 

 cotton appear to proliferate to about the same extent. The use of fertilizers 

 apparently does not increase proliferation and the proliferating tissue is not 

 poisonous to the weevils. Death results from mechanical causes. 



Destroying weevils in cowpeas (Oklahoma St a. Rpt. 1906, pp. 83-35). — 

 Brief data are given relative to the amount of damage caused by weevils in 

 cowpeas. Experiments with gasoline and carbon bisulphid showed that the 

 gasoline did not evaporate as readily as carbon bisulphid and is less effective 

 than the latter. One pound of carbon bisulphid was. found to be sufficient to 

 treat 40 bu. of cowpeas. 



A locust campaign, E. R. Sawer {Rliodesian Agr. Jour., 3 (1906), No. 3, pp. 

 225-230). — Attention is called to the great devastation which may be worked 

 by the locust if these pests are not controlled. The organization of the field 

 work in the locust campaign in South Africa is described. Particular atten- 

 tion is given in this campaign to Pacliytylus sulcicollis and Acrklium purpuri- 

 ferum. The methods of destruction are quite varied, but the most effective and 

 most economic appears to be in the use of an arsenical spray. 



Locust birds and locust poisons, C. P. Lounsbuey (Agr. Jour. Cape Good 

 Hope, 28 (1906), No. 3, pp. 36Ji-366). — Several complaints were made that the 

 extensive use of arsenic and other poisons in the destruction of locusts had led 

 Incidentally to the poisoning of locust birds from eating the dead locusts. The 

 opinions of a number of entomologists who had experience with this matter 

 in South Africa are quoted to the effect that no such poisoning takes place. 

 It appears that birds or domestic fowls may eat poisoned locusts in consider- 

 able quantities without thereby being badly affected. 



Codling moth work in 1904, E. D. Ball and E. G. Peterson ( Utah Sta. Bui. 

 95, pp. 65-107, figs. 12). — The authors in their work on the codling moth have 

 proceeded on the basis that the first work to be done is a careful determina- 

 tion of the life history of this pest under local conditions. Various points con- 

 nected with the habits and life history of the codling moth in Utah were care- 

 fully worked out anew so that the practical spraying experiments devised by 

 the authors rested on a scientific basis. 



The work reported in the present bulletin had for its chief objects the deter- 

 mination of the relative value of early and late sprays and the separation of 

 the injury caused by the first brood from that of the second. The spraying 

 experiments were carried out in 3 orchards containing a number of varieties. 

 Paris green was applied at the rate of 1 lb. to 120 gal, of water. The early 

 applications were made just after the blossoms fell (May 28 to June 1) and a 

 second time (June 10 to 14). Three late applications were made on August 4, 

 August 18, and September 2. All of the trees were banded and the bands 

 examined every 3 days in order to count the larvie. All windfalls were care- 

 fully examined, and between August 1 and 3 all of the apples on the trees were 

 examined to determine whether the larvte entered through the calyx or side of 

 the apple. 



The observations on the periods covered by the 2 broods of codling moth in 

 Utah indicate clearly that August 1 is about the separating point between the 2 

 broods. The results of spraying were carefully determined with reference to 

 the production of the first and second broods of codling moth. It appears that 

 two early applications of Paris green killed 89 per cent of the first brood of 



