SPRAY SCHEDULE 
FOR SMALL HOME ORCHARD 
(Prepared by Dr. Albert Hartzell and Dr. S. E. A. McCallan 
of the Boyce Thompson Institute for Plant Research, Inc., 
Yonkers, New York) 
APPLE 
Dormant Spray 
(The treatment is made alter the buds have begun to 
swell, but before they show grcen at the tips.) 
Material: Oil emulsion or miscible oil. 
Control: Scale. 
Delayed Dormant Spray 
(When the leaves of the blossom buds are out about % 
to % inch.) 
Material: 1-3/5 cups lime-sulphur. 
2-2/5 oz. hydrated lime. 
1/10 cup nicotine sulphate. 
Water to make 5 gallons. 
Control: Scab, Aphids, Red Bug, Bud Moth. 
Pre-blossom Spray 
(Before the blossom buds open. ) 
Material: 1-3/5 cups lime sulphur. 
2-2/5 oz. hydrated lime. 
2-2/5 oz. lead arsenate. 
Water to make 5 gallons. 
Control: Scab—leaf roller. 
Calyx Spray 
(When 75% of the petals have fallen.) 
Material: 4 oz. wettable sulphur. 
2-2/5 oz. hydrated lime. 
2-2/5 oz. lead arsenate. 
1/10 cup nicotine sulphate. 
Water to make 5 gallons. 
Control: Codling Moth, Scab, Aphids, Fruit blotch. 
Post Calyx Spray 
(Ten days after calyx**) 
Material: 4 oz. wetted sulphur.* 
2-2/5 oz. hydrated lime. 
2-2/5 oz. lead arsenate. 
Water to make 5 gallons. 
Control: Curculio, Codling Moth, Aphids, Scab, Black 
Rot, Bitter Rot. 
First Apple Maggot or second Codling Moth Cover Spray 
6 weeks after calyx about June 25 to July 1. 
Material: Repeat Post Calyx Spray. 
Control: Apple Maggot, Codling Moth, Scab. 
Second Apple Maggot or third Codling Moth Cover Spray 
Not later than July 15th. 
Material: Repeat Post Calyx Spray. 
Control: Apple Maggot, Codling Moth, Scab. : 
PEAR t 
Dormant Spray 
(Early in the spring when the flies appear on the twigs 
and are ready to lay eggs and the buds are not yet show- 
ing green.) 
Material: Lubricating oil emulsion diluted to contain 3% 
of actual oil. 
Control: Pear Psylla, Scab, Blister Mite, Scale. 
[44 | 
