270 EXPERIMENT STATION RECORD. 



last, but notes in addition the importance of the insect as a pest to nur- 

 sery stock. The destruction of old apple trees is advised, as also the 

 insecticides strong soap suds, kerosene emulsion, and hot water. Sev- 

 eral pages are devoted to a bibliography. 



Notes on the recent army worm outbreak (pp. 583-607, pis. 4). — A 

 reprint of Bulletin 104 of the station (E. S. E., 8, p. 609), with the 

 addition of an extended bibliography. 



Miscellaneous notes of the season (pp. 608-619). — In this, the beginning 

 of part second, the author notes briefly that experiments on cucumbers 

 indicate that they can not be protected from attacks of the striped 

 cucumber beetles by the use of either poisoned Bordeaux mixture or 

 even poisoned resin-lime mixture; that the Colorado potato beetle will 

 not feed on potato vines that have been thoroughly treated with Bor- 

 deaux mixture, and that the vines are also probably free from attacks of 

 the flea beetle; that the squash borer can probably be entirely con- 

 trolled by the cultural methods of harrowing the ground in the fall 

 where the squash vines rest and uniform spring or even fall plowing to 

 a depth of 6 or 8 in. and not replowing; that onion thrips may be con- 

 trolled by planting a few rows of set onions on the margins of fields 

 and spraying these every week or 10 days with kerosene emulsion, a»d 

 that the red spider may be treated by gathering in the fall the leaves 

 affected by it and burning them, and by spraying in the spring with 

 a solution of whale-oil soap or with kerosene emulsion. The various 

 experiments are given more or less in detail. 



The pear midge (Diplosis pyrivora) is also discussed. Experiments 

 were made with kainit, which was applied at the rate of 1,500 to 2,000 

 lbs. per acre. The author states that the experiments show that there 

 is a decided gain in the use of kainit, but there is a question to be 

 solved, namely, how long an orchard will stand an application of the 

 fertilizer at the rates noted, especially where the orchard is on a tena- 

 cious clay soil; and he suggests the question whether plowing an 

 orchard in midsummer will not be fully as discouraging to the midge 

 as an application of potash salt. It is thought that the latter method 

 is far preferable to the former. According to the observations made, 

 the midges appear April 15 to 30, pair as soon as they rise from the 

 ground, lay their eggs, and die within 24 hours. 



Notes on the cabbage plusia and remedies for the same (pp. 620-628). — 

 In summarizing the experiments in regard to this insect (Plusiabrassiocs), 

 which are given more or less in detail, it is noted that the most practi- 

 cable way of checking its work on lettuce is to keep the ventilators of 

 forcing houses closed by means of mosquito netting. Where the insect 

 affects cabbage in the open field poisoned resin-lime mixture or poisoned 

 Bordeaux mixture to which resin mixture has been added may be 

 employed. The resin-lime mixture was found to make Paris green and 

 London purple adhere not only to the upper, but also to the lower, 

 sides of the leaves. 



