SLUGS EATING THE LEAF SURFACE 289 
Fic. 425.— Work and larva of the Pear-slug. Original. 
and if the slugs are numerous, the entire foliage of the tree may look 
scorched and drop off. When nearly full grown, the larve lose their 
slimy coating with the last 
molt, and are then a clear yel- 
low in color. 
There are two or three gen- 
erations in a season. The 
slugs are apt to be more nu- 
merous in the middle or latter 
part of summer. The adult is 
asawfly. Eggs are laid within 
Fic. 426.— Adult of the Pear-slug. En- 
the tissues of the leaf. : au 
larged and natural size. Original. 
Ordinarily the simplest means 
of control is to apply Paris green or arsenate of lead to the foliage. 
The slugs are easily killed. 
The Peach and Plum Slug (Cal’roa amygdalina Rohwer) 
The work of this insect is similar to that of the common pear-slug. 
The species is found in the Gulf states. There are half a dozen or more 
generations each season, and injury is most severe toward the end of 
summer. Spraying with an arsenical poison is the readiest remedy. 
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