45-4 EXPERIMENT STATION RECORD. 



generations annually. The insect is carefully described in all Its stages. Ap- 

 parently the adults do not live longer than 1 week. The life cycle of the sum- 

 nier generation is about 4^ months and of the winter generation 74 months. 



A number of natural enemies, mostly Hymenoptera, have been observed. The 

 best means of controlling the insect consist in good cultivation and care of the 

 peach orchards and in cutting the larvae out of their burrows. 



The Howard scale, E. P. Taylor {Colorado Sta. Bui. 120, i)p. 19, figs. //).— 

 Aspidiotus howardi was discovered on the fruit and barli of the prune and wild 

 plum in 1894. It now occurs in many fruit orchards in Colorado, and appears 

 to be a native of the State. It is less destructive than the San Jose scale, but it 

 attacks pear, plums, and prunes. 



A number of natural enemies have been observed which help to keep the pest 

 in check, but the main reliance must be placed on the use of lime-sulphur wash 

 in late spring. 



Codling' moth, C. Bokner {Min. Bl. K. Preuss. Vcrwalt. Lamliv., Domdncn n. 

 Forsten, 3 (1907), No. 4, Anz. BHlagc, pp. 104-107, figs. 6).— The appearance 

 and life history of the codling moth are briefly outlined. The pest is to be com- 

 bated by the use of bands about infested trees, destruction of windfall apples, 

 and spraying with Bordeaux mixture containing an arsenical. 



Mites and lice on poultry, N. Banks {U. S. Dcpt. Agr., Bur. Ent. Circ. 92, 

 pp. S, figs. 6). — A description is given of the common chicken mite. This pest 

 may best be controlled by repeated spraying of hen houses with kerosene emul- 

 sion. Other remedies, such as lime and sulphur or whitewash and carbolic acid, 

 have given fairly good results. The mite which causes scaly legs may be con- 

 trolled by the use of warm soap suds and sulphur ointment. Brief notes are 

 also given on Cnemidocoptes gallirm, Rivoltasia Mfurcata, and Argas miniatus. 



In controlling chicken lice mixtures of carbolic acid and lime, or kerosene, 

 sulphur, and lime, or kerosene and naphthaline may ^e used. Notes ai-e also 

 given on Mcnopon biseriatum. If eggs are hatched in incubators and chickens 

 cared for in brooders, poultry may be raised without becoming infested with lice 

 and mites. 



Dipping nursery stock in insecticides, C. P. Close {Delaware Sta. Rpts. 

 1904-1906, pp. 4S-69). — Nursery stock of apple, pear, plum, and peach trees was 

 dipped in kerosene limoid emulsion, pure kerosene, crude petroleum, lime-sul- 

 phur-salt wash, and a number of proprietary insecticides. The stock was 

 dipped and planted from April 25 to May 4. As a result of these tests it ap- 

 pears undesirable to dip the roots of nursery stock. As a dip for the tops kero- 

 sene, crude petroleum, and a 25 per cent kerosene limoid emulsion are recom- 

 mended for ai)ples and pears, and for plums crude petroleum and kerosene 

 limoid 30 to 50 per cent. The results obtained with peaches are not consid- 

 ered satisfactory. 



Young strawberry plants of several varieties were dipped in various strengths 

 of kerosene limoid emulsion, whale-oil soap-kerosene emulsion, whale-oil soap 

 alone, and tobacco with or without whale-oil soap. The mixtures containing 

 kerosene injured the plants quite seriously, while those containing tobacco or 

 whale-oil soap were relatively harmless. 



Fumigation for the destruction of insects, A. I. Kendall {Proc. Ann. Conf. 

 Sanit. Off. N. Y., 6 {1906), pp. 191-196) .—Attention is called to the work which 

 has been done in the destruction of mosquitoes and household insects in Cuba, 

 Panama, and elsewhere. In this work sulphur, pyrethrum, camphor and car- 

 bolic acid, hydrocyanic-acid gas. etc. have been used. 



Lead arsenate and Paris green, .J. P. Street and W. E. Britton ( Connecticut 

 State Sta. Bui. 157, pp. 13). — The content of arsenic oxid in samples of lead 

 arsenic varied from 11.29 to 21.91 per cent, and the lead oxid from 25.59 to 



