628 NEW JEBSEY AGRIOULTUEAL COLLEGE 



In the New Jersey orchards the results demonstrated that, as -against 

 the codling moth, the dust was quite as effective as the liquid sprays,. 

 and no more applications would seem to be necessary. As to the effect 

 in preventing disease no notes were made, and I have no opinion to 

 offer. An application containing sulphur, applied in mid-summer to 

 check scale development, was entirely ineffective. 



The present statvs of the matter seems to be that one pound of 

 Paris green or green arsenoid, thoroughly mixed with fiftv pounds of 

 fine, dry hydrate of lime, or any one of the prepared or process limes, 

 may be dusted on apple trees with as good results against the codling 

 moth as could be obtained with liquids. The date of application is 

 the same in either ease, and three dustings are desirable, though two 

 will answer if the time be properly chosen. If the application is m.ade 

 when the trees are a little damp the material will stick quite as well 

 as the liquids. 



As against any leaf-feeding caterpillars or other insects, this 

 method is equally available, and" on rough foliage it will be more satis- 

 factory than on smooth or waxy leaves, from which the dust blows or 

 washes easily. The lime alone, or with flowers of sulphur intermixed 

 at the rate of one pound of sulphur in twenty of lime, will be effective 

 against most plant lice, especially the green varieties, and it is probable 

 that fine tobacco dust would be even Ijetter. 



There is no warrant for believing that any of the dust applications 

 can be in any way effective against scale insects. 



RECORDS OF THE EXPERIMENT ORCHARB. 



There is a constant decrease in the number of trees in this little lot, 

 due chiefly to the increased size of a few, but also, in part, to a dis- 

 inclination to replace trees in situations that invite trespass. 



After the conclusion of the record for 1904, tree Xo. 22, whicli was 

 in a very bad place, overshadowed by Xo. 35 and by a grapery, was 

 removed and set in the place of Xo. 46, removed October 1st, 1904. 

 There were no winter treatments. 



March 6th, 1905, on a bright, sunny day, moderate northwest wind, 

 sprayed trees 2, 7, 8, 29, 30 and 38 with kerosene-napthol. one to ten. 

 Sprayed trees 19, 20, 31, 32. 33, 34. 42, 44 and 47 with napthol- 

 sulphur, one to thirty-two. Sprayed tree Xo. 7 with textil ci], one to 

 twenty, applying thoroughly. 



