The plum-curculio (_Conotrachelus nenuphar_ Herbst) is sometimes a
troublesome pest of the peach. It is a rough, grayish, hump-backed
snout-beetle somewhat less than a quarter of an inch in length, an
insect so familiar to fruit-growers as hardly to need description. The
female beetle pierces the skin of the young peaches and places an egg
in the puncture. About this cavity she gouges out a crescent-shaped
trench, the puncture and trench making the star and crescent of the
Ottoman Empire, hence the common name, "Little Turk." The egg-laying
process may be repeated in a number of fruits and from each egg a larva
hatches within a week and burrows to the stone, making a wormy fruit.
Most of the infested fruits drop. Poisoning with an arsenate is the
chief means of combating the pest. Rubbish and vegetation offer hiding
places and hibernating quarters for the insects and hence cultivated
orchards are most free from curculio. The thin-skinned nectarines are
damaged most by the insect but peaches are attacked rather freely.
Early peaches suffer much more than late ones from curculio; thus,
of standard sorts in New York, Greensboro and Carman are usually
injured more or less while Salwey and Chili seldom show a puncture.
The plum-orchard is usually the source of supply of curculio and early
peaches ought not, therefore, be set with or near plums.
San Jose scale (_Aspidiotus perniciosus_ Comstock) is as harmful to
peaches as to any other tree-fruit. The insect is now so well known
in all fruit-growing regions as scarcely to need description. It is
usually first recognized by its work, evidence of its presence being
dead or dying twigs--oftentimes the whole tree is moribund. Examination
shows the twigs or trees to be covered with myriads of minute scales,
the size of a small pin-head, which give the infested bark a scurfy,
ashy look. If the bark be cut or scraped, a reddish discoloration is
found. Leaves and fruit as well as bark are infested, the insidious
pest, however, usually first gaining a foothold on the trunk or a
large branch. Reproduction is continuous throughout the summer in this
climate so that the insects multiply by leaps and bounds. The peach,
possibly, succumbs more quickly than any other fruit, three years
sufficing for the destruction of a young orchard if the pest be brought
in on nursery stock. The rougher-barked, older trees resist longer and
suffer less injury. Still, old orchards are irretrievably ruined in
one or two seasons of unrestricted breeding. Peach-growers, in common
with all fruit-growers, find the lime-sulphur solution applied in the
dormant season the most effective spray in combating this insect.
There are several insect-enemies of the scale that are valuable allies
and entomologists say that the insects seem more susceptible to the
climatic condition of the country than formerly but still natural
checks are far from sufficient and the peach-grower should quickly
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