14 



MozNETTE (G. F.). The Fruit-tree Leaf Syneta, Spraying Data, and 

 Biological Notes. — Jl. Econ. Entom., Concord, ix, lio. 5, October 

 1916, pp. 458-461, 2 plates (4 figs.) 



This article contains further details as to the distribution and control 

 of Syneta albida, Lee. [see this Review, Ser. A, iii, p. 257]. In California 

 it is often confused with S. simplex, Lee. The original host-plant is 

 not known, but the beetles have often been found attacking maple 

 and hazelnut. As this insect did considerable damage in Willamette 

 Valley, Oregon, in the spring of 1916, a series of spraying experiments 

 were undertaken. Fifty Italian prunes were sprayed with Black Leaf 40 

 (1 : 400) and lime-sulphur (1 : 35) ; fifty with white hellebore, 2 lb. 

 to 50 U.S. gallons of lime-sulphur (1 : 35) ; one hundred with tri- 

 plumbic arsenate of lead 3 lb. to 50 U.S. gallons of lime-sulphur 

 (1 : 35). A few cherry trees were also sprayed as a test for the effects 

 of scorching. Owing to excessive rains, the first two experiments were 

 not successful, but the last gave good results. Arsenate of lead in the 

 usual form cannot be used in greater strength than 2 lb. to 50 U.S. 

 gallons of lime-sulphur (1 : 35). Stronger mixtures of the tri-plumbic 

 form than that given might possibly be used with good results. Where 

 the fungus Sclerotina frudigena is also present, a combination spray 

 should be used. If Bordeaux mixture (4:4: 50) or lime-sulphur 

 (1 : 35) be used for brown rot on prunes, plums and cherries, arsenate 

 of lead should be added in the proportion of 3 lb. to 50 gallons of the 

 spray, the tri-plumbic arsenate of lead being preferable. To Bordeaux 

 mixture (4:4: 50) or lime-sulphur (1 : 50), applied as a spray for brown 

 rot just after the blossoms open, arsenate of lead in the proportion of 

 3 lb. to 50 U.S. gallons of the spray should be added. On apple and 

 pear, 3 lb. of arsenate of lead to 50 U.S. gallons of lime-sulphur should 

 be used for apple scab {Venturia jpomi). 



EssiG (E. 0.). The Chrysanthemum Gall-fly, Diarihronomyia kypor 

 gaea, F. Low. — Jl. Econ. Entom., Concord, ix, no. 5, October 1916, 

 pp. 461-468, 2 plates, 3 figs. 



Some additional details as to this Cecidomyid are given [see this 

 Review, Ser. A, iv, p. 445]. It is now reported as being very abundant 

 and destructive in the region of San Francisco Bay. An effective con- 

 trol measure is to cut back the young shoots in November or December, 

 and again in February and March, and burn the refuse. Nicotine 

 sulphate or Black Leaf 40, in the proportion of 1 to 1,600 of water, 

 must be used every two or three weeks from June until blossoming 

 time. Several parasites were reared during the summer from infested 

 plants, including a species of Amblymerus and another of Tetrastichus. 

 A bibliography of sixteen references is appended. 



De Ong (E. E.). Municipal Control of the Argentine Ant. — Jl. Econ. 

 Entom., Concord, ix, no. 5, October 1916, pp. 468-472. 



This article reviews the work done by the city of Berkeley since 

 1908 in controlling the Argentine Ant [Iridomyrmex humilis]. A list 

 of the towns now affected is given, showing the rapid spread of this 

 pest, which now infests a district 700 miles long. The preparation 



