227 



secures a licence for such sale. Kadi separate l)ran(l of fertilizers 

 Inquires a license for each year it is sohl or offered for sale." The 

 analyses of fertilizers were made by Dr. Kedzie as the duly author- 

 ized agent of the State Board of Agriculture. 



lULLKTIX No. .-;{ (STATIOX). Ai;(4UST. ISSl). 



Si'i;avix(; Willi iiii; auskxites, a. .1. Cooiv, M. S. (pp. ;>-S). — 

 I iisecticide.s for the phnn eurcitl'w. — After several years unsuccessful 

 experience the author succeeded, in 1888, in securing good results 

 from spraying Paris green on phim trees to destroy curculio. In this 

 case the trees were sprayed three times at intervals of eight days. 

 The poor results of ])revious exj^eriments are thought to have been 

 due to want of thoroughness. In the dry season of 1888 car!>olized 

 plaster (1 pint of crude carbolic acid to 50 pounds of plaster), applied 

 three times, was found quite as efficient as the arsenites to repel the 

 curcidio. but in the wet season of 1889 the plaster proved of no avail. 

 The author draws the following conclusions from his experience : 

 ■■ The arsenites and carbolized plaster will protect against the plum 

 curculio if they can be kept on the tree or fruit. But in case of very 

 frequent rains the jarring method will not oidy be cheaper but much 

 more effective. Again, as our ^ild fruits are more cleared away we 

 n)ust liaA-e plums in our orchards to protect the ajjples from curculio." 

 It is urged that these insecticides should not be applied before the 

 blossoms fall lest bees may be destroyed by the poisons. 



Injury to foUcKjc h>j ai'senites. — Here is given a tabulated record 

 of experiments on plum, cheriy, apple, pear, peach, willow, elm, and 

 maple trees, in 1889, to learn the effects of different arsenites on 

 foliage and whether the date of treatment and atmospheric condi- 

 tions have any influence on the amount of such injury. The follow- 

 ing conclusions are drawn from this experiment: 



•' London purple is more injurious to the foliage than is Paris 

 green; and Avhite arsenic — arsenious acid — is more harmfid than is 

 either London purple or Paris green. 



•• Peach foliage is especially susceptible to injury, and cherry 

 foliage the least so of any of the kinds treated. 



'• It would seem that London purple and white arsenic, used just 

 before a rain, are more harmful than when used dui-ing a drought. 



" It would seem that si)i'aying soon after the foliage puts out is less 

 harmful tliaii wlien it is delayed a few days, or better, a few weeks. 



" London i)uri)le may be used on apple, plum, cherry, pear, and 

 most ornamental trees, but on these should never be stronger than 1 

 ))ound to -200 gallons of water. If the application is to be repeated, 

 as it must be for the curculio. to prove effective, or if it is to be used 

 in June or Jidy. Paris green should he used in the same proportion as 

 above, or else we should only use 1 pound of London purple to 300 

 irallons of water. 



