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Walch For Mite
Infestations In Orchard
Contrd Early
Inspect your orchards now to forestall mite injury.
That’s the advice coming from O. W. Underhill, associate entomologist at Virginia Experiment tation, who says orchardmen should not wait for foliage injury to show before thinking about the mite problem. Generally, when leaves begin to bronze, it is too late to spray profitably.
The European red mite is now - in the egg stage (red-colored eggs more or less in clusters) oh the underside of limbs and spurs, mostly at or near crotches. The 4-spot, or Schoenei mite is wintering as pink females in clusters under loose bark on the trunk and large limbs. Anyone can learn to spot these danger signals. A pocket hand-lens is nice to have; but good eyesight and a bright day are usually enough. • ^ .
The relative numbers of the European red mite eggs or 4-spot females indicate the period and degree df possible danger to the foliage later. It is important to know whether or not they are numerous and generally spread in order to take proper and timely
may be developing.
The recommended method of application is to mix 5 pounds of urea per 100'gallons of water in any of the various sprays which are applied to the tree after the leaves have developed. The number of sprays containing nitrogen which should be applied depends on the need of the trees for nitrogen and their age. A mature tree receiving 20 gallons of the above •pray would get one pound of urea fertilizer which would be about 40 per cent of the totals recommended nitrogen application for a 20-year-old tree.
The urea spray is not absorbed by peach leaves and therefore should not be’ applied to such trees.
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