.^0 STATE POMOLOGICAL SOCIETY. 



rity of the foliage, as in the first spraying for the apple at the first 

 of June, the leaves will bear a stronger solution than they will at the 

 last of the month or later. This seemingly curious and anomalous 

 feature is proved true in actual practice ; 3d, the momentum with 

 which the spray from the force-pump strikes the leaves ; 4th, the 

 fineness of the spray as determined by the fineness of the nozzle ; 

 5lh, the condition of the weather at the time of spraying and for a 

 week following. The last and most important factor of all which I 

 will now mention as influencing the amount of Paris green which can 

 be safely used (as in our question before asked) is this, viz : the 

 equal suspension of the Paris green throughout the barrel to which 

 the force-pump is attached. The great specific gravity of this sub- 

 stance, causing it to quickly settle to the bottom of the barrel, 

 thereby precipitating an undue proportion of the insecticide around 

 the suction of the force-pump which always extends to the bottom 

 of the barrel. 



Having just simply enumerated these six factors which enter into 

 and greatly modify the results connected with our question before 

 stated, viz. : how much Paris green can be used with safety and 

 effectiveness in spraying for the apple at the first application? In 

 reply, as a general rule I have found that fifteen ounces of a pure 

 article to 300 gallons of water or in the same proportion two and one- 

 half ounces to fifty gallons, is sufficient for the apple ; for the pear, 

 plum and cheny not to exceed two ounces to fifty gallons of water 

 as their foliage is more tender. When the conditions above noted 

 are complied with I have no doubt that two ounces to fifty gallons 

 will be found suflacient for the first spraying of the apple and should 

 never use more than that amount for subsequent sprayings. Con- 

 dition of weather at time of spraying and for the next week I con- 

 sider one of the most important factors above noted ; a very hot sun 

 at the time increases the injurious action of the spray on the foliage, 

 while on the contrary a heavy rain within a day or two after the 

 spraying will destroy all good results from the operation. The limits 

 of this article will not permit explaining the details of other condi- 

 tions affecting this many sided and most interesting study of spray- 

 ing. But the most interesting and important fact to which I have 

 not yet referred is that even in its present imperfect state, the 

 conditions already known being observed it will save from the 

 destruction of the codling moth, the curculio and various other insect 

 enemies, at least seventy-five per cent of sound, luscious, full-grown 



