Ninth Report of the State Entomologist 417 



While the Bordeaux mixture may be freely and advantageously used 

 in combination with London purple, it should be borne in mind that the 

 ammoniacal solutions of copper — so valuable against the apple-scab and 

 Bome other of the plant diseases — should not be used with it; and espe- 

 cially, that these solutions are very harmful when combined with Paris 

 green, as the ammonia acts as a solvent of the arsenite, and thereby 

 greatly adds to the injury that it may cause. In evidence of this, see 

 Bulletin No. 11 (page 14), of the Massachusetts Agricultural Experiment 

 Station, January, 1891, where a report of experiments shows that carbo- 

 nate of copper solution, combined with Paris green in the proportion of 

 one pound to five hundred gallons of water very seriously injured the 

 foliage. 



Spraying for the plum curcullo. — Experiments by Dr. C. M. Weed, 

 of the Ohio Agricultural Experiment Station, show that plum trees 

 sprayed four times with Paris green — one to two hundred gallons of 

 water, gave twice the amount of protection that was obtained from 

 jarring, while "vastly cheaper and easier of application." It at the 

 same time, gave protection from the plum-leaf fungus and the brown 

 rot, that later visited the unsprayed portion of the orchard. Bulletin 

 {Vol. Ill, JVb. 8, September, 1890), of the. Ohio Agr. Exjjer. Station. 



Spraying for the codling-moth. — The following results were obtained 

 by M. H. Beckwith, of the Delaware Agricultural Experiment Station 

 {Bulleti7i No. 8, March, 1890): 1. Trees sprayed with Paris green (1 to 

 150, too strong, and 1 to 200) gave four times as large a yield as did the 

 unsprayed. 2. The average yield of sound apples from the sprayed, 

 was nine times as great as from the unsprayed. 3. Of the sound apples 

 gathered from the sprayed trees, ninety per cent had been saved by the 

 spraying. 4. The sound apples from the former were much superior 

 in quality to those from the latter. 



A new insecticide machine. — Dr. Riley, in his Presidential Address 

 before the Association of Economic Entomologists, at Champaign, 111., 

 has noticed, with commendation, a new and distinct type of insecticide 

 apparatus — the invention of Mr. Strawson, of Newbury, Berks, Eng- 

 land. We quote, as follows: " The machine is called the ' Strawsonizer,' 

 and is a pneumatic or air-blast distributor, and may be adapted to a 

 variety of uses, such as broadcast sowing of grains, distribution of 

 fertilizers or of disinfectants in cities, and of dry or liquid insecticides. 

 The machine is light, simple in construction, and easily operated by 

 one man, the larger sizes being drawn by a horse, and the smaller bv 

 hand power. The distributing power is obtained by a blast of air pro- 

 duced by a revolving fan worked by the traveling wheels of the 

 machine. 



1893. 53 



