228 



Bulletin 176. 



1895-1896. 



A wash made of resin, linseed oil and heesivax has been recom- 

 mended. It would be rather expensive to use on a large scale, and 

 it is very doubtful if it would be more effectual than the resin wash 

 just discussed. 



Paris green and glue wash. — This wash was apparently first sug- 

 gested by Neal in 1889 (Bull. 4, Fla. Expt. Station), and a few years 

 ago was strongly recommended in prominent entomological and hor- 

 ticultural books. We dissolved one })Ound of common glue in one- 

 half gallon water, then added one ounce of Paris green, and diluted 

 the whole to two gallons with water (Neal's formula). We used it 

 at the above strength and later only half as strong. Within a week 

 after this wash was applied the leaves on nearly every tree began to 

 drop off and in tliree weeks most of the trees were dead. The wash 

 had killed the bark where it was applied, and had thus practically 

 girdled the tree at the base. Others have reported similar results 

 from its use, so that it should never be used, at least on young trees. 



Probably the addition of whiteioash, as suggested by Smith (Insect 

 Life, lY, -13), wcnild render the wash less injurious to the trees, but 

 we do not believe it would make an effective wash of it. 



White or green jpaint. — Ordinary white paint, made of linseed 

 oil and white lead, '^^as strongly recommended about five years ago 

 by the Virginia and Nebraska Experiment Stations as an effective 

 application for borers. We used white paint for two years with the 

 following results : 



