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cherry trees were treated by Professor Cook with London purple on the 

 same dates, with the lesult that good cro])s of perfect fruit were gath- 

 ered, ''while cherry and apple trees near by suffered seriously." Pro- 

 fessor Cook concludes that with plums, cherries, and apples, two or 

 three applications for the Curculio are of advantage. 



He also discusses methods of applying liquids, mentioning favorablj'^ 

 the geared Victor Field force-pump, the Perfection hand-i)ump, Gould's 

 double-acting barrel-pump, the Whitman pump, and the Lewis pnmps. 

 Some of these we could not indorse so favorably for such work, but 

 will withhold any remarks we might make for a forthcoming bulletin 

 on this subject. The subject of nozzles is mentioned, and in six words 

 he disposes of the Eiley or Cyclone nozzle as a comparative failure, an 

 experience which neither accords with our own nor with that of many 

 other horticulturists and entomologists both at home and abroad, and 

 makes one question whether Professor Cook uses it properly or in im- 

 proved forms. The Nixon nozzle and the Lowell graduating nozzle are 

 commended. All the illustrations are from trade circulars. 



A number of remedies, aside from arsenical sjjrays, are noticed. 

 Among these, carbolized lime and plaster for Curculio, applied dry, are 

 said to have been successful. Bisulphide of carbon was used very suc- 

 cessfully to destroy ants by making an opening down into the colony, 

 pouring in about half a gill of the liquid, and stop[)ing up the opening 

 by packing in clay. We have had best success with it by igniting it 

 after covering the ground for about ten minutes with a damp blanket. 



Mr. C. P. Gillette, the entomologist of the Iowa station, has two ar- 

 ticles in Bulletin No. 2 of the station,* received October 8, the one en- 

 titled "A few important Chinch Bug remedies," and the other "Arsenic 

 experiments." 



Under his first head, Mr. Gillette considers plowing, burning, shading 

 the ground, and neat farming. Mr. Gillette has made some experiments 

 in plowing, and finds that when the bugs are buried to a depth of 7 

 inches they never come to the surface again. At 5 inches nearly all 

 are permanently interred, while at 3 inches they all emerge within 

 twenty-four hours. He advises, therefore, that the furrow should be 

 turned at least G inches deep, and that a jointer should be used on the 

 plow. , 



The subject of using soluble arsenic as an insecticide has again been 

 brought to public attention by several writers, and this probably sug- 

 gested Mr. Gillette's experiments. But we believe that its use does not 

 rest on a clear conception of what constitutes a practical insecticide. 

 The end sought in the use of arsenic is to destroy the insect with a 

 minimum amount used in the safest possible manner to plant and ani- 



* Iowa Agricultural College, Experiment Station. Bulletin 2, August, 1888. 



