New York AgricurturRAL ExXprErIMENT STATION. 397 
flower were sprayed with the same mixture, as was also a trap- 
crop’® of rutabagas which had been set on the border of the field. 
When: the plants were examined, June 2, a few dead worms 
were found. ‘The plants had been so severely attacked by the 
cabbage root maggot that the.field had to be reset. This was 
done on June 5, the plants being dipped, roots and all, into the 
resin lime mixture before setting. ‘This treatment was too severe 
for the plants. 
A third attempt was made to get a stand of medium early cauli- 
flower, but the plants were obtained from a seed bed infested with 
club-root, hence the crop proved a failure. 
Very few worms were to be found throughout the summer on 
the trap-crop. | 
Another attempt was made to test resin lime mixture on cauli- 
flower, also on Brussels sprouts. In a field of nearly 10 acres 
about 1-2 acre of cauliflower and 1-4 acre of Brussels 
sprouts were sprayed with the mixture’ on August 31. Inspec- 
tion of the work on September 8 showed that many of the cabbage 
worms, also caterpillars of the cabbage Plutella, or diamond 
backed moth, had been killed. No dead loopers were found. 
The field was resprayed September 29. Many of the cauliflower 
plants were heading and could not be sprayed at time of the 
second application. When examined, October 15, the sprayed 
13 Rutabagas were set on the margins of the field, the object being to furnish 
plants at which all the butterflies of the cabbage worm in that vicinity could 
collect and deposit their eggs, and by keeping these plants sprayed through- 
out the summer with the resin lime mixture and Paris green, to minimize the 
number of worms. The rutabagas were set severak weeks before the cauli- 
flowers were put out. This method is of little value on Long Island, for the 
simple reason that Siberian kale, and frequently Brussels sprouts and cabbage 
stumps are left on the fields over the winter and during the spring. These to- 
gether with wild radish which grows plentifully along fences and in neglected 
fields furnish abundant places for the butterflies to deposit their eggs. 
14 An attempt was made to spray cauliflowers with Paris green and Bor- 
deaux mixture combined; such a small amount of this adhered to the leaves 
that the test was abandoned. Most of the loopers were found spinning cocoons 
at the time of spraying, August 31. The resin lime mixture was applied with 
a knapsack sprayer. 
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