758 EXPEEIMENT STATION EECORD. 



net profit was obtained from plats in which 5 applications were made. " It is 

 not impossible that among the earliest matnriug varieties there are some with 

 which the use of the powdered lead arsenate will prove more profitable than 

 with others. In the experiments at Lakeland, where conditions in all i)lats 

 (with one exception) were practically alike, there was a marked difference in 

 the increased production obtained by the use of the powder on different varie- 

 ties. Thus the experiment with Peebles Chosen showed a profit of but 27 cts. 

 an acre from the use of the arsenate, while the Rublee AntiboU Weevil cotton, 

 in the plat adjoining, showed a profit of $23.54 per acre from its use. Whether 

 the variety of cotton luid anything to do with tliis marked difference in the re- 

 sults of poisoning we are unable to say, having no other experiments with either 

 of these varieties." Other factors mentioned as operating to increase or de- 

 crease the amount of cotton made by the use of this poison include fertilizers, 

 character of soil, rains, heat, parasites, and other cotton insects. 



It is concluded that tlie best results will be obtained from 5 applications, 

 made from 5 to 7 days apart, the first to be made at the time the first squares 

 form. Following the first and second applications of from 2 to 2i lbs. per acre, 

 the amount of arsenate should be increased until at the fifth from 4 to 7 lbs. 

 per acre should be used. The authors consider the key to success to lie in get- 

 ting the poison with force into every terminal bud, into every blossom, and into 

 the involucre of every square. It is pointed out that the price paid for poison, 

 cost of labor, and the market price received for lint and seed all go to deter- 

 mine the amount of profit or loss following the use of the arsenate. 



An experiment conducted in midsummer at Baton Rouge is thought to demon- 

 strate the futility of trying to attack the boll weevils with the arsenate of lead 

 late in the season. Experiments made by private parties are also considered. 



The review is by E. D. Sanderson. 



Additional notes upon the breeding of the coffee-bean weevil, E. S. Tucker 

 (Jour. Econ. Ent., 2 (I'JO'J), No. 6, pp. 37.J-58; ) .—Observations of the coffee- 

 bean weevil made since the paper previously noted (E. S. R., 21, p. 653) was 

 submitted for publication, are reported. 



The species has been found to breed in cornstalks during the winter and 

 spring months without interruption, although a large mortality of all stages is 

 apparently caused l)y cold weather. In August the weevil was found breeding 

 in green cornstalks at Alexandria, La. As the attacks occur more commonly 

 on leaves than stalks, the author concludes that tlie weevils first breed in the 

 base of the leaves and later attack the joints, probably as each in turn begins 

 to dry. Stalks examined on August 3 were in a green sappy condition, some 

 still having fresh, green .leaves altliough no leaves were found attacked except 

 dried ones. One-half of the cornstalks examined at Matsura, La., in March 

 were injured and old cornfields examined at Victoria, Tex., the same month 

 showed some 10 per cent of the stalks to have been attacked. Field observations 

 have failed to bring out any definite evidence that green cotton bolls are at- 

 tacked. A species of mite found attacking the pup:e has been identified as 

 TyrogJyphtts brcviccps 



An annotated list is given of the literature consulted. 



Papers on cereal and forage insects. — The clover root curculio, V. L. Wil- 

 DERMUTH (V. 8. Dept. Agr., Bur. Ent. Bid. 85, pi. 3, pp. 29-38, figs. 5).— While 

 the clover root curculio {Sitcmes hispidulns) has never been so abundant in 

 this country as totally to destroy a clover crop, the author believes that 

 injuries which have before been either unnoticed or considered as due to other 

 clover pests were partly the work of the adults and larvae of this beetle. " From 

 the history of other species of insects that have been imported into this country, 

 and from the fact that late in November, 1909, at two localities, namely, 



