214 THE PLUM CURCULIO. 
gallons of spray. In smaller spraying operations the proper quantity 
of arsenate of lead may be weighed out as needed, and thinned with 
water. In all cases the arsenate of lead solution should be strained 
before or as it is poured into the spray tank. The necessary care 
should be exercised to keep the poison out of the reach of domestic 
and other animals. Powdered arsenate of lead is used at about one- 
half the strength of the paste form. 
SCHEDULE OF APPLICATIONS. 
Most of the peach orchards in the eastern half of the United States 
should be given the combined treatment for brown-rot, scab, and 
curculio. This is particularly true of the southern orchards, where 
all these troubles are prevalent. In some of the more northern 
orchards the curculio is not very troublesome, but as a rule it will 
probably pay to add the arsenate of lead in at least the first lime- 
sulphur application. 
The self-boiled lime-sulphur mixture referred to in the following 
outlines of treatment should be made of a strength of 8 pounds of 
lime and 8 pounds of sulphur to each 50 gallons of water, and the 
arsenate of lead should be used at the rate of 2 pounds to each 50 
gallons of the mixture or of water. When the poison is used in 
water there should be added the milk of lime made from slaking 2 
to 3 pounds of good stone lime. When used in the lime-sulphur 
mixture additional lime will not be necessary. 
Midseason varieties. — The midseason varieties of peaches, such as 
Reeves, Belle, Early Crawford, Elberta, Late Crawford, Chairs, 
Fox, and Beers Smock, should be sprayed as follows : 
(1) With arsenate of lead alone, about 10 days after the petals fall (PI. XX), or at the 
time the calyxes are shedding. 
(2) With self -boiled lime-sulphur and arsenate of lead, two weeks later, or four to 
five weeks after the petals have been shed. 
(3) With self -boiled lime-sulphur alone, four to five weeks before the fruit ripens. 
Late varieties. — The Salway, Heath, Bilyeu, and varieties with a 
similar ripening period should be given the same treatment prescribed 
for midseason varieties, with an additional treatment of self -boiled 
lime-sulphur alone, to be applied three or four weeks after the second 
application. 
Early varieties. — The Greensboro, Carman, Hiley, Mountain Rose, 
and varieties having the same ripening period should receive the first 
and second applications prescribed for midseason varieties. 
Where the curculio is not particularly bad, as in Connecticut, 
western New York, and Michigan, the first treatment, which is for 
this insect only, may be omitted. Also for numerous orchards 
throughout the Middle States where the insect, especially in the 
younger orchards, is not yet very troublesome, orchardists should 
