; 

New York AGRICULTURAL EXPERIMENT STATION. 145 
Albany, N. Y. It appeared to consist largely of arsenic and was 
soluble in water to about the same extent as the common white 
arsenic of commerce. 
The experiment was made on ten large trees* of the Fall Pippin 
apple, the sprayings being made upon one-half of each tree, the 
other half being left unsprayed as a check. Four of the trees 
were sprayed with Paris green in water at the rate of an ounce te 
ten gallons, three with London purple at the same rate and three 
with the “ Zoektein poison” at the rate of an ounce to twenty 
The first spraying was made June 5, at which time 
Other 
gallons. 
the young fruits were about.the size of huckleberries. 
sprayings were made June 16, June 27 and July 2. - 
September 21 to 24 the wind-falls under the sprayed and 
unsprayed portions of the trees, with a few of the picked fruits, 
were examined for injuries from the codling moth. It appeared 
that the picked fruits contained very few larve except those_of 
the second brood of moths, for which the eggs had probably been 
deposited too late to be much affected by the The 
examination was, therefore, confined chiefly to the wind-falls. The 
sprayings. 
results secured were as follows: 




- calcium sulphide. 




Number 
Of trode) jan Gene 
examined. sig 
é aoa aes Sprayed part....... 347 13.26 
Treated with Paris green. ...... 00.000. cee eee 
Unsprayed par®.... 355 52.68 
POMC tM LAVOL OMS DLAVEOUDALL, ameed clic vsinaineie chante tales znieiyte fei 4 whens inlets 39.42 
\ ( Sprayed jOPER GER ety A i 493 23.53 
Treated: with} Hondon purple. ces cscs ccs oss ; 
l Unsprayed part.... 413 29.30 
Par Cent 1h 1avor Of BOTAY OU. DAT seo cel emecuiras turing Bela olelea et fUn ‘aetel ciate 5.77 
: COMMEK 
fon tye he : ‘ Sprayed part....... 294 9,22 
Treated with “ Zoektein poison”’............. CONMEK 
Unsprayed part.... 112 38.39 
RSRCON TID TAVOM OLS PLA VOC Alt sc ssiwladiersetes sue gieterawinls dete lie Urabe allo bese 99.17 





* The trees treated were the same ones as were treated for the apple 
scab, as described in the article on ‘Experiments with Fungicides,’’ the 
poisons being added to the same water, and the two substances applied at 
the same time. The Paris green was applied with soda hyposulphite, the 
London purple with potassium sulphide and the ‘“‘ Zoektein poison ’’ with 
19 
