886 EXPERIMENT STATIOlsr RECORD. 



chopped grans with arsenic or Paris green and i)lacing Mils material upon <ir just 

 beneatli the surface of the soil. 



The most important natural enemy of the changais the 7iative species of l)lack])ird. 

 Other species of birds have heen observed feeding upon the changa. 



Army worms on millet, G. d'Utka (BdL Agr. Sdn Paulo, 3. arr., 1903, No. S, pp. 

 15S-1G2). — Notes on the habits and life history of Jjcm-nti'ia imipmicia and on means 

 of combating this insect in millet fields. 



Methods of controlling- the boll weevil, W. D. Hunter ( f7. ^. Bept. Agr., 

 Farmer.'^' Bui. 16.3, pp. 16, figs. 2). — The Division of Entomology has a contract 

 whereby certain planters agree to manage the cotton crop in certain locations under 

 the directions of the Division. About 850 acres were managed in that way during 

 1902. The cotton boll w'eevil, while confined to Texas, occupies about 28 per cent, 

 of the cotton acreage of the United States. It lias lieen shown, however, that 

 cotton can be grown profitably in spite of the attacks of this insect. The author 

 believes that the weevil will ultimately be distributed all over the cotton belt, since 

 there are no influences which can check its distribution. The author mentions a 

 number of methods W'hich are ineffective in combating the weevil. These include 

 various nostrums, machines, and the use of cotton-seed meal. It was found that the 

 various varieties of Egyptian cotton are more susceptible to damage l)y the weevil 

 than are the ordinary varieties of American upland cotton. The remedies which 

 are recommended for controlling the weevil include early planting, thorough culti- 

 vation of the fields, destruction of all cotton stalks in the fall not later than the first 

 week in October, jjlantingthe rows faraj)art, and thinning out the plants in the rows. 



Potato insecticides and fungicides in 1902, C. D. Woods {Maine tSta. Bui. 87, 

 pp. 197-209): — A number of insecticides were used in combating the potato beetle, 

 among which mention may be made of Paris green, arsenate of lead. Black Death, 

 Quick Death, English Bug Compound, Kno-bug, and Hammond's Slug Shot. A 

 test of the value of Kno-bug as a fungicide was made by the station with the result 

 that the yield was found to be much less on plats treated with this substance than 

 on others treated with Bordeaux mixture. The disease which affected the ])otatoes 

 in this experiment was rot. An analysis of Kno-bug showed it to contain oidy about 

 22 per cent of Paris green, while 88 per cent was ordinary land plaster. 



An experiment was instituted for the purpose of testing the relative; value of Paris 

 green, Bug Death, and arsenate of lead in combating potato bugs. The amounts of 

 Bug Death used were those recommended by the manufacturers. The field was 

 sprayed 5 times. The results of these experiments are presented in detail. It was 

 found that at no time was there any noticeable difference in the color, size, or vigor 

 of the vines treated with the different substances. Paris green kept the vines rather 

 freer from potato l)ugs than did Bug Death or arsenate of lead. In an exjieriment 

 conducted by E. A. Rogers potatoes treated with Bug Death were found to yield 

 more heavily than those sprayed with Paris green or other insecticides. These 

 results, however, w-ere not confirmed liy the station work. 



Insects injurious to Cucurbitaceous plants, H. A. Surface {Penn.vjlvania Dejyt. 

 Agr. Bui. 96, pp. 30, pis. 24)- — The insects which most commonly attack cultivated 

 cucurbits are discussed in systematic'order and notes are given on the best remedies 

 for combating the different species. The insects to which most attention is given 

 are onion thrips, squash bug, melon louse, cucumber louse, pickle moth, melon 

 worm, squash borer, Ejyilachna horealis, cucumber beetles, fiea-beetles, and undeter- 

 mined fly larvai. Occasional injury is noticed from I^imax, centipedes, and earth 

 worms. 



The remedies discussed by the author include net covering, paper tent for fumi- 

 gating w'ith bisuljjhid of carbon, tarred board, board traps, various cultural remedies, 

 such as clearing up rubbish, killing weeds, rotation of crops, use of trap crops, hand 

 picking, fertilizers, late fall plowing, early planting, excessive seeding, and the use 



