354 ReporT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
EXPERIMENT NO. VI. 
BEN DAVIS APPLES DIPPED:FOR DIFFERENT TIME PERIODS IN A LIME= 
SULPHUR WASH. 
This experiment was to ascertain the effects upon nursery fruit 
trees of immersion for different time periods in the lime-sulphur 
wash. Apples of the Ben Davis variety were used. There were 
180 trees, divided into six lots of 30 trees each. For dipping, each 
lot was first equally divided, and 15 trees were wholly immersed 
and the remaining 15 trees were dipped, leaving the roots untreated. 
The temperature of the wash was 60° F. The time periods were 
instantaneous immersion and dipping for one, two, three, five and 
ten minutes respectively. 
Results on trees— The effects of the treatments are briefly as 
follows: 
Lot 1. IMMERSION. 
TOPS ONLY. 
May 22. Trees leafing. 
June 5. Foliage fairly abundant. 
July 5. Trees normal, with healthy foliage and vigorous growth. 
TOPS AND ROOTS, 
May 22. Trees leafing as above. 
June 5. General condition of trees same as above, only some leaves are 
wilting. 
July 5. Three trees are alive and 12 trees are dead. 
Lot 2. DiIpPpeD ONE MINUTE. 
TOPS ONLY. 
May 22. Trees leafing. 
June 5. Trees in foliage, showing small losses of leaf buds and slight twig 
injuries. 
July 5. Trees in excellent condition. 
TOPS AND ROOTS, 
May 22. Trees normal. hike 
June 5. Trees are dying. sin) 
July 5. All trees are dead. 
Lot 3. Dirpep Two MINUTES. 
TOPS ONLY. 
May 22. Six trees are normal and 9g trees are very backward. 
June 5. Fourteen trees are in full foliage and 1 tree dead. 
July 5. Fourteen trees are normal and 1 tree is dead. 
