Show IMMENSE AMOUNT DAMAGE DONE BY PEAR SLUG leaves of cherry and pear trees attacked by this insert in iowa and plant Is often left entirely bare last summer many cherry trees in various parts of iowa were stripped of their leaves by a dull slimy slug pear trees also are attacked by this pest perhaps even more than cherry trees hence the common name of tho insect this slug feeds on the upper surface of the leaves not eating holes through them but the upper portion and leaving the veins bare leaves thus eaten by the slugs dry and fall from the tree and frequently leave the trees entirely bare of foliage in iowa these slugs appear twice during the season the first brood appears in june and the slugs be come full grown early in july while senate of lead aa pounds to 50 gallons of water will do the work even better than parts green and Is preferable where it can be obtained easily hellebore applied dry or in a small quantity of water Is also very effective in killing the slugs the first brood of the slugs la rather short lived it requires only about a month from the egg stage to tho time the slug matures during bosl of the time while it is feeding the slug Is covered with a slimy substance but at the last change of skin the slime Is thrown off and the slug becomes a light orange color clean i and dry after this molt tha slug A pear slug enlarged a adult saw fly female b slug with slime removed c slug in normal state d leaves with slugs natural size a b c much enlarged the second brood comes on during the month of august it would be best then to kill off the slugs when they first appear in june and so prevent the defoliation of the trees by the second brood in august when the slugs first appear on the leaves the trees should be given a thorough treatment with parts green or some other arsenical poison sinco the slugs feed openly on the upper sides of the leaves there need be lit tie difficulty in them for only a few trees the parla green may be applied dry mixed with air slaked lime or even flour 1 part of the parla green to 20 or more parts of the other material for a liquid spray parts green at tho rate of 13 or 1 4 pound to 60 gallons of water will do the work adding about a pound of quick lame to each barrel of water to pro vent any burning of the leaves ar goes into the ground here at forma a cell in the earth within which it changes to the pupa or resting stage and the adult fly emerges in about 12 to 15 days after the slug has en the soil the flies which lay the eggs for the next brood 0 slugs are rather small black insects ln sects about a fifth of an inch long and with four wings the eggs are laid in tiny pockets made by the files in jahe under sides of the leaves these eggs hatch and the second brood of the slugs worl on the trees during august and when they become full grown go to the ground during the winter the slugs of this second brood may be found in their cells beneath the trees which were infested by them in the summer time the pear cherry plum and quince are the trees which are most attacked by these slugs |