144 Wisconsin State Horticultural Society. 



mixture and the fine spray. Yet it is always wise to keep 

 stock from such an orchard till a heavy rain has washed 

 off the little poison that may have fallen on the grass. 



I would never use Paris green on fruit that is to be used 

 within a few days from the time the poison is applied. Thus 

 I would never use it to fence out the currant slug. The 

 usable fruit and the insect in this case are often upon us at 

 one and the same time. Neither would I use these arsenites 

 on cabbages. Certainly not after the head has formed, for 

 the very conformation of the vegetable makes such use 

 dangerous. Again, no one should ever use or handle these 

 substances with the bare, unprotected hand — especially is 

 this caution necessary in case of any abrasion of the skin. 

 Neglect of this caution resulted in the death of a very 

 talented young horticulturist of Indiana some years since. 

 I am free to say, and I have probably handled these poisons 

 as much as any one in the country, that reasonable caution 

 makes their use perfectly safe. 



In using these arsenites to destroy the Coding moth larva, 

 we at the same time kill the Conker worms, the several 

 species of leaf rollers that often fairly dig out the buds in 

 early spring, and are very destructive; the old American 

 tent caterpillar that flounts his tents in the orchardist's face 

 just as the leaves are putting out in May, and thus in using 

 this remedy, we are killing not simply two, but several birds 

 with one stone. I would also use these insecticides, to pro- 

 tect against all leaf eating insects, where there is no dan- 

 ger. Thus, on shade and ornamental trees that are being 

 defoliated, on fruit vines and trees early in the season, and 

 on such vegetables as potatoes, melons, etc., where the 

 foliage is not used to swell our larders. 



It remains to be said that as this poison must be eaton to 

 destroy, it is impotent against the plum curculio, as here the 

 egs is pushed by the mother weevil through the poison be- 

 yond the reach of harm. The same is true of all lice and 

 bugs. They do not munch and chew, but insert their sharp 

 beaks and suck the rich juices of the plant. Hence, they 

 can pump the very life out of the plants, though the latter 



