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Pear and Cherry-slug (E. cerase) a-larva, b-adult. 



Pear and Cherry Slug 



These insects do considerable damage to the foliage of pear 

 and quince trees, eating out the leaf pulp and leaving only a skele- 

 ton of parts of the leaf attacked. Finely powdered lime or road 

 dust, sifted on to the trees, easily control it. Dry soil shoveled 

 over the trees from between the rows, often answers as well as 

 anything. 



The Cabbage Worm 



(Pontia rapae) 



In gardens, spray for this and similar worms, with tobacco extract 

 (1 to 50). The parasite Teromalus puparium is said to be very 

 efficient for these worms, and a colony of them from the State 

 Insectary would well repay a trial. 



The Tent Caterpillar 



(Malacosoma disstria) 



Wherever deciduous fruit trees grow these insects are found at 

 times. They live in web nests, often very large and enclosing 

 several branches, and eat the leaves on the part of the tree nearest 

 them, often completely defoliating it. 



The eggs are laid by a moth in summer, in clusters around the 

 outer twigs of the tree, but do not hatch until the following spring, 

 and when the trees are pruned in the winter they should be looked 

 for, cut off, and all prunings burned. Any nests of the worms 

 should also be cut out or burned on the tree with a torch. 



The California Tussock Moth 



(Hemerocampa vetusta) 



This pest, like the tent caterpillar, is hatched in the spring from 

 an egg layed in the June before, and it attacks both leaves and 

 fruit. The moth is practically wingless, and can be kept from 

 climbing the trees by the tanglefoot bands. When beginning to 

 feed, the worms can be jarred from the trees and prevented from 



