576 NEW JEESEY AGRICULTURAL COLLEGE 



and after using it one is apt to have scaly fruit. The soluble oil 

 works quickly — skills the top layei-s of scale, and in fact all the 

 scale it hits. But it does its work and the first rain washes it ofl^ 

 and if one scale in one hundred is left, conditions are just right 

 for it to multiply and take possession of the tree. So I conceived 

 the idea of using, first, the Scalecide to destroy 99 per cent., and 

 then the lime and sulpliur to kill and cheek the 1 per cent., but I 

 confess I was not prepared to see such wonderful success. Neither 

 the Scalecide alone nor the lime and sulphur alone compared in 

 satisfaction with the two together. What I wonder is, whether 

 two ajipliciitions of either agent would have been as effectual as- 

 the combination. I suspect not." 



J\lr. Dickerson's report answers the question in part. After re- 

 ferring to the above orcliards and their condition when he saw 

 them in midsummer, he adds : In like manner I examined large^ 

 bearing apple trees which had been sprayed twice with lime, salt 

 and sulphur. They had been very scaly, but now, late in summer^ 

 w^ere very clean. The same conditions existed and the same re- 

 sults were obtained with Scalecide. I find many growers willing 

 to make two sprayings and who feel that it is necessary, especially 

 where trees are badly infested or are very large. In all such cases 

 I believe that two sprayings are advisable. 



A peculiarity to be noticed in excursions through the fruit- 

 growing sections is that while in one place the mineral oil is almost 

 universally used in some form, in others some lime and sulphur 

 combination is the favorite. Mr. Dickerson refers to this and 

 gives a partial explanation : "'The material used in a particular 

 locality depends largely upon local conditions. In reveral places 

 I found that some good, energetic man had taken the initiative,, 

 sprayed his trees thoroughly with some particular mixture and 

 obtained good results. This had been an example to others in the 

 community, wlio did similar spraying with more or less success,, 

 and so it came about that that particular material came to be used 

 in that locality. The character of the mixtures, also, have largely 

 to do witli their use. The various oil sprays, for examples, arc 

 easy to pre])are and apply ; they spray nicely and cover well, and 

 have no irritating effect upon the skin. Eor these reasons I find 

 that many prefer to use them rather than the more troublesome 

 lime, sulphur and salt wash, even though they have to do more 

 spraying, and in some cases even though they had to spray twice."' 



