1891.] ESSAYS. 85 



In our experiments the destruction of the rose bug by the use 

 of Paris green was not fully demonstrated, but from reports re- 

 ceived from other (|uarters and the light we did gain from our 

 work we feel sure that by the concentrated form in which it has 

 l)een proved it can be applied with the Bordeaux mixture, it 

 must succumb to this treatment. 



The sulphate of copper solution was applied to the vines 

 before the leaves unfolded, and the Bordeaux mixture at inter- 

 vals of from one to three weeks up to July 28. Paris green 

 was used only up to about July 1, or about four weeks from the 

 time the rose bugs began to appear. 



The Strawberry. During the spring and early summer our 

 strawberry leaves in some localities are seriously injured by a 

 little brown beetle that feeds upon them. This little beetle is 

 the crown borer, the larvae of which are at w^ork during the 

 summer eating the crown and main roots. Soon after the fruit 

 has ripened, and sometimes earlier, the leaf blight attacks the 

 leaves, and when both of these enemies appear, it is a diflScult 

 matter to get rid of them. It is believed, however, that Paris 

 green will destroy the crown borer, and it is certain that it will 

 prevent the leaf blight. An application of Paris green should 

 be made as soon as the new leaves begin to unfold in the spring, 

 and another a little while before the first blossoms open. 



Neither the Paris green nor copper solutions can be safely 

 applied after the blossoms open ; but as soon as the fruit is 

 gathered the Bordeaux mixture should be used alone up to about 

 August 1st, when the Paris green should be added to destroy 

 the beetles which again appear at this time. 



The cutting and burning of the leaves, or their destruction 

 with the blight spores at the same time, with dilute sulphuric 

 acid, as has been recommended, is undoubtedly of some value, 

 but the Bordeaux mixture is thought more effectual, and what 

 foliage is preserved will add strength to the plants. 



If one fears to use Paris green, hellebore will undoubtedly 

 prove successful in the destruction of the crown borer, which 

 feeds on the strawberry foliage. 



I give now formulae for making the fungicides that I have 

 recommended. 



