polis crematory was secured for this purpose. Ninety sacks of
this same shipment which were illegally unloaded at Casselton, N. Dak.,
were buried by North Dakota authorities. It is to be hoped that this
disease does not find its way into the potato belt in the Red River
Valley.

NOTES ON PLANT PESTS.

Prepared by Section of Insect Pests, A. G. RUGGLES, and by
Section of Plant Diseases, E. C. STAKMAN, University Farm.

The first real spraying of the apple orchard should be given just as the
center bud of the flower cluster begins to show pink. The material to
use in the spraying compound is lime-sulphur (1 to 40) plus arsenate of
lead, 1-1/2 pounds of the powder, or three pounds of the arsenate of
paste to fifty gallons of the made-up lime-sulphur. If done properly
this will get the scab of the apple, blossom blight or the brown rot in
the plum, and is the most important spray for plum pocket. The arsenate
of lead in the mixture will control the young of leaf eating insects and
precocious plum curculios.

The second most important spraying of the year is given within a week
after the blossoms fall, the same spraying compound being used. This
spraying kills many of the germinating spores of such things as apple
scab and also is the important spray for codling worm as well as for the
plum curculio and for leaf eating insects.

Watch carefully for the hatching of plant lice eggs. The ideal time to
spray for these is just after hatching, and before the young lice become
hidden in the bud scales or in the curl of the leaves. The spraying
material to use at this time is a sulphate of nicotine.

Plow the plum orchard as soon as possible in order to turn under mummied
plums, which are responsible for much of the primary infection of brown
rot.

Plowing the apple orchard early to turn under the old leaves is also
essential in preventing scab spreading to the flower stalks.

Cultivate the vineyard in order to turn under the mummies. Practice
clean cultivation from the very beginning in order to help control black
rot and downy mildew. If the rot or mildew was very bad in the previous
years, early spraying with the Bordeaux mixture 4-4-50 is very
important.

Keep the radishes, cauliflowers, and cabbages covered with a poison
spray from April 30 to May 20 to prevent the ravages of the cabbage
maggot. This should be applied once a week in fair weather, and twice a
week in rainy weather. The spray is made as follows