A third
application should be made from the 1st to the 10th of June. Prune trees
should be treated as soon as the spider appears. In the Sacramento
valley this usually occurs about the first week of July. Full-grown
trees require about a pound of sulphur which should be thoroughly
distributed throughout the foliage. The old method of throwing a handful
of sulphur in the branches of the tree or on the ground under the tree
is valueless. The use of a blower is economical in large orchards, but a
can with perforated bottom is frequently used on young trees or small
orchards with good results. In normal seasons the spider is easily,
controlled by dry sulphuring. When the pest does not yield to this
treatment, a spray is recommended.
Liquid Spray for Red Spider.
Is there any liquid spray I can use in my spraying that will kill the
red spider without injuring the foliage of the almond?
A liquid spray for red spider is made by taking sulphur 30 pounds; lime
(reduced to milk form by water), 15 pounds; water, 200 gallons; or use
commercial lime-sulphur, 4 or 5 gallons to 200 gallons of water. These
sprays can be applied without injuring the foliage. They are more
expensive in labor cost than dry sulphuring, but are more effective.
Apple-Leaf Aphis.
I am sending herewith a small piece from one of my young apple trees. If
you can, will you kindly tell me what the insects are an it, and what I
had better do for them?
The apple twig which you send is infested with the eggs of the leaf
aphis or leaf louse.
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