In former years the damage done by this caterpillar to Cherries and other fruit trees has been enormous. Its life-history is now well known, and as this is fully described at p. 76, as well as the grease-band method for catching the moths, it will not need repetition here.

The Cherry Black Fly (Myzua ribis) is known all over Europe, Asia, Africa, Australia, and America. It often swarms on the shoots, and gets into the leaves and curls them up. When numbers are collected together they form such a copious amount of honey dew that it drops into the fruit. Upon this honey dew the "soot fungus " grows, and so the fruit is spoilt. The result of the attack on the tip of the shoots is that they die and turn brown. The rather shiny black Aphis has yellowish and black legs. The wingless females breed with great rapidity. In July they change to pupae which have an olive-green hue with dull-yellowish wing cases. The winged viviparous females from these leave the Cherry, but where they go to we do not know. This Aphis returns to the Cherry in the autumn, and eggs are laid on the trees.

Treatment

Treatment consists of heavily washing the trees with soft soap and quassia. This should be done before they have commenced to curl the leaves. If the trees are small, the best remedy is to wash them with a strong solution of soap and quassia extract, using 8 or 10 lb. of each ingredient to 100 gall, of water. In washing to kill this Aphis it is above all necessary to use a coarse spray and great force, so that the wash may penetrate the curled leaves and kill the Aphis.

The following other insects attack the Cherry: Winter Moth (Cheima-tobia brumata), Mottled Umber (Hybernia defoliaria), Figure-of-8 Moth (Diloba cceruleocephala), Lackey Moth (Clisiocampa neustria), Gold-tail Moth (Porthesia similis), Buff Tip (Phalera bucephala), Wood Leopard (Zeuzera pyrina), Cherry and Plum-tree Borer (Semasia woe-berana), Cherry-fruit Moth (Argyresthia nitidella), Pistol-case Bearer (Coleophora anatipenella), Bark Beetle (Scolytus rugulosus), Chafers (Melolontha vulgaris, Phyllopertha horticola), Leaf Weevils (Phyllobius oblongus and P. maculicomis), Cherry and Pear Slugworm (Eriocampa limacina), Cherry Bug (Tropicoris rufipes), Cuckoo Spit (Philamus spumarms). [f. v. t.]