460 



By spraying four times during the growing season with lead arsenate- 

 and Bordeaux mixture [R.A.E., A, v, 364] the average yield was 

 increased by about 50 bushels per acre. 



The first application should be made when the plants are from 4 to 7 

 inches high, or earlier if the beetles appear sooner. A constant film 

 of spray should be noticeable on the foliage if the best results are to 

 be obtained. 



Leiby (R. W.). Spraying Irish Potatoes. — North Carolina Agric, 

 Extens. Service, Raleigh, Extens. Circ. 103, March 1920, 14 pp., 

 6 figs. [Received 24th August 1920.] 



The results of two years' experiments with sprays for the protection 

 of the early crop of potatoes show that the best treatment is the same- 

 as advocated for the autumn crop. The early crop should be sprayed 

 at least three times, and it is advisable to make the first application 

 when the first eggs hatch. The chief pest of this crop is the Colorado 

 potato beetle [Leptinotarsa decemlitieata]. Dusting with lead arsenate 

 and powdered lime at the rate of 1 lb. to 6 lb., or calcium arsenate and 

 lime at the rate of 1 to 8, will destroy this beetle on the early crops, 

 but will not protect them from bhght. 



Sherman (F.). The Cotton Boll Weevil. — North Carolina Agric. 

 Extens. Service, Raleigh, Extens. Circ. 104, March 1920, 20 pp., 

 8 figs. [Received 24th August 1920.] 



In view of the fact that Anthonomus grandis (cotton boll weevil) 

 has now reached North Carolina, this circular gives an account of the 

 insect's history in the United States, the manner in which it may be 

 expected to spread, and the damage it is likely to do in North Carolina. 

 The usual course of disturbance and lecovery in an attack over a number 

 of years is described, with the measures that should be taken to ofi'set 

 losses from it. The life-history of the weevil is given together with 

 direct measures against it, including the destruction of the stalks in 

 the autumn earlier than they would die naturally, to lessen the number 

 of weevils that live through the winter by taking away some of their 

 shelter, clean cultivation for the same reason, and poisoning, etc., 

 [cf. R.A.E., A, vi, 17 ; vii, 74]. ■ 



Sherman (F.) & Leiby (R. W.). Green Clover Worm as a Pest of 

 Soybeans with special reference to the Outbreak of 1919. — 



North Carolina Agric. Extens. Service, Raleigh, Extens. Circ. 105, 

 July 1920, 14 pp., 4 figs. 



The buUv of the information on Plathypeva scabra here given has 

 been dealt with elsewhere [R.A.E., A, viii, 384, 390]. 



Ehrhorn (E. M.). Division of Plant Inspection. — Hawaiian Forester 

 and Agriculturist, Honolulu, xvii, no. 7, July 1920, pp. 204-206. 



The pests intercepted during May 1920 included ants {Monomoriwn 

 sp.) in packing from the United States, weevils in vegetable seeds from 

 Manila, and ants {Prenol&pis sp.) in yams from China. 



