273 



Two important pests were found in fruit-growing sections, namely, 

 Agrilus sinuatus (sinuate pear borer) and Zeuzera pyrina (leopard 

 moth). Tetranychus mytilaspidis (citrus mite) was observed on apples 

 and pears in Ontario county. This species is a pest of citrus trees in 

 Florida and CaUfornia, causing the premature falhng of the leaves, 

 but can be controlled by the use of a lime-sulphur spray or dry powdered 

 sulphur. Galerucella cavicollis, feeding normally on Primus pennsyl- 

 vanicus, was observed to migrate to cultivated fruits during early 

 Jmie ; young plantings of sour cherries and peaches were most severely 

 attacked. Arsenate of lead or arsenate of lime (8 lb. to 100 U.S. gals, 

 water) sprayed on both sides of the leaves, or arsenicals combined with 

 Bordeaux mixture, gave satisfactory results. Nicotine solution and 

 soap proved most suitable for peach trees. 



Parrott (P. J.) & Glasgow (H.). Sinuate Pear Borer and Leopard 

 Moth. ^ — New York Agric. Expt. Sta., Geneva, Circ. no. 44, 

 1st December 1915, 3 pp., 2 plates. [Received 12th May 1916.] 



Agrilus sinuatus (sinuate pear borer) and Zeuzera fyrina (leopard 

 moth) have been f omid in fruit-growing sections of New York State on 

 imported nursery stock. A. sinuatus is confined to the south-eastern 

 portion of the State, being restricted to five or six counties contiguous 

 with the Hudson River. The adult appears early in June and deposits 

 eggs in crevices in the bark of the trunk or branches of the pear. 

 Upon hatching, the larva burrows a winding tunnel in the sapwood. 

 The presence of the borer is shown externally by a splitting or swelling 

 of the bark. As a result of attack, the tree is either killed or rendered 

 unproductive. The adults feed readily on the foliage and so may 

 possibly be controlled by the application of an arsenical spray during 

 the latter part of May. For small trees the most effective method of 

 control is to cut into the mine and destroy the larvae. The use of a 

 wash on the trunk and branches, to serve as a deterrent to oviposition, 

 is worthy of trial. 



Z. j^yrina is present in the same area as the preceding insect. It has 

 been observed on various lands of nursery stock and on old pear trees. 

 In Europe shade trees, apple, pear, cherry and plum are attacked. 

 The eggs are deposited in crevices of the bark. The larvae burrow 

 in the middle of young twigs in the early stages, and later attack larger 

 branches, in which they mine beneath the bark. The bark covering 

 infested areas usually decays, and in cases of severe attack the death 

 of the tree may result. Control measures include the destruction of 

 infested branches and twigs, together with that of larvae in the mines 

 by probing or fumigation with carbon bisulphide. 



Parrott (P. J.), Hodgkiss (H. E.) & Lathrop (F. H.). Plant Lice 

 Injurious to Apple Orchards, i. Studies on Control of Newly- 

 Hatched Aphides, — Neiv York Agric. Expt. Sta., Geneva, Bull, 

 no. 415, Februarv 1916, pp. 11-53, 6 figs., 8 plates, 9 tables. 

 [Received 12th May 1916.] 



This bulletin contains further data on the habits of Aphids, on the 

 susceptibihty of newly-hatched forms to various insecticides and on 



