. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. Fiff. 1. The Cherry Scale. IJuIrcanium ceraso- rum (ckll) on l*ear. Slightly, reduced. (Oriji:inal.) Cherry and Pear Slug Caliroa cerasi Linn H. P. Wilson This insect is a common pest of pear, cherry, plum and other fruit trees, and although not hard to control often causes considerable damage. The name "slug". Fig. 1. Cherry Leaves In.
. The encyclopedia of practical horticulture; a reference system of commercial horticulture, covering the practical and scientific phases of horticulture, with special reference to fruits and vegetables;. Gardening; Fruit-culture; Vegetable gardening. Fiff. 1. The Cherry Scale. IJuIrcanium ceraso- rum (ckll) on l*ear. Slightly, reduced. (Oriji:inal.) Cherry and Pear Slug Caliroa cerasi Linn H. P. Wilson This insect is a common pest of pear, cherry, plum and other fruit trees, and although not hard to control often causes considerable damage. The name "slug". Fig. 1. Cherry Leaves by Sluss. Fi?:. 2. Adult of Cherry and Pear Slug. is applied on account of the slimy black exudation with which the larva sur- rounds itself. It appears to be a native of Europe and was known as a pest as far back as 1740. In America the distribution seems to occur with the areas where its principal host plants are found. A large number of trees, including forest and orchard trees, have been reported as attacked by this insect, but cherry, pear and plum are said to be the favorite plants. When present in any locality the larvae soon make themselves familiar to the fruit grower both by their appearance and by the injury which they do. In the Northwest we have found but two complete broods with some indication that there may be a partial third. The first adults appear in early spring, but for some reason the eggs do not develop or are not laid until May or June; as soon as they hatch the young larvae be- gin feeding on the leaves and from that time until the leaves drop the slugs are present in varying numbers. Most of them, however, are found in two distinct periods: the larvae of the first genera- tion appear more abundant during June and July; the larvae of the second gen- eration are most numerous during Au- gust and September. ^ Webster has worked out the following schedule for Iowa:. Please note that these images are extracted from scanned page images that may have be
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