New York Agricultural Experiment Station. 615 



as when applied during the fall. Fairly good results have been 

 obtained at the Florida Experiment Station from the use of " resin 

 wash." In tliis section of the country winter is not only a disa- 

 greeable time to apply the washes but rains are liable to remove 

 them before they have time to act on the dormant scale insects. 

 Hence the only conclusion that can be drawn is, that better results 

 will be obtained by applying " winter washes " during the fall ; 

 that " winter washes" applied in the winter are liable to be a waste 

 of time. Also, that the simplest remedy, viz., whale-oil soap, 

 makes the best wash for general use. 



In order that any wash may prove a success when applied to nur- 

 sery stock for the " Pernicious Scale " it is absolutely necessary to 

 remove the dirt from around the crown and apply the wash 

 thoroughly from buds down to the roots. This is especially true 

 for all stock which is budded, grafted or grown from cuttings. 

 Hence for nursery stock the wash must be applied during the fall or 

 early spring. It is recommended that the wash be applied during 

 fall "in preference to spring, as the " Pernicious Scale " is active 

 during the fall and more susceptible than during the spring. 



It should be remembered that whale-oil soap solution is more dif- 

 ficult to apply than some other washes unless applied during warm 

 weather. By spraying the tops of the tree with a summer wash at 

 intervals of tive days during July, possibly whale-oil soap solution 

 could be used to an advantage on the trunk of the trees during the 

 summer. 



All things considered, the gas treatment is the simplest and 

 cheapest remedy that many nurserymen can use. As far as tested 

 on nursery stock here on Long Island it has given as good results 

 as any of the other remedies.. 



For nurserymen who dig their stock only as the orders are filled, 

 probably the dipping of the stock in a solution of whale-oil soap 

 will prove the simplest and cheapest remedy. 



The " Oyster-sliell Bark-louse " and the " Euonymus Scale " can 

 be controlled by summer washes. If the latter are applied often 

 enough and thoroughly at the right season, viz., from the 1st of 

 June to the 1st of July for the "Oyster-shell Bark-louse," and 

 from the 20th of June to the 20th of July for the "Euonymus 

 Scale," these pests can be exterminated. 



Linseed oil is not a safe remedy to use at any season on peach 



