1 67 



SAN JOSE SCALE 



The San Jose scale is, without doubt, causing more in- 

 jury to fruit trees and bushes than any other one insect. It 

 is best handled when the tree is dormant, and is controlled 

 by spraying with a contact poison. For large trees, or trees 

 where the infestation is very serious, and also where the 

 trees are in proximity to painted buildings or fences, solu- 

 ble or miscible oil can be used to the best advantage. This 

 is a commercially prepared oil to be diluted with water, and 

 is very easily handled. It should make a perfect white emul- 

 sion, and when applied should cover parts of the tree not 

 actually touched, as it has the spreading quality of any oil. 

 Lime-sulfur is also used very extensively, and for small trees 

 is of great value, not only for killing the scale, but also for 

 destroying fungous growths. It is extremely difficult to 

 handle, and for this reason it is almost impossible to spray 

 large trees thoroughly enough to control the insects. There 

 are many commercial brands Avhich are very valuable, or the 

 mixture can be made up by the grower himself. Where pos- 

 sible I think it is very advisable to make it up fresh and ap- 

 ply it hot. If you are not acquainted with the formula, write 

 your State Entomologist or some one who has been handling 

 this material. 



Summing up the question of controlling the San Jose 

 icale, my advice Avould be that for small trees not badly in- 

 fested, use lime-sulfur, preferably home-made. If the trees 

 are small and easily handled, but badly infested, use soluble 

 oil until the insect is at least partially controlled, and after- 

 M^ard use lime-sulfur. If the trees are very large, use solu- 

 ble oil at least every other year. ]My reasons for these recom- 

 mendations are due to the ease with Avhich the soluble oil 

 is handled, and the fact that all of the surface of the tree is 

 more liable to be thoroughly covered. 



LEAP-EATING INSECTS 

 Codling Moth, Etc. 



For controlling this class of insects, some form of ar- 

 senic is used, preferably arsenate of lead. This poison ad- 

 heres to the foliage very nearly throughout the season, and 

 does not injure by burning. When using this material do 

 not go entirely by the recommendations as to strength which 

 you will find printed on the label. - The manufacturer is 



