I^EW York Agkicultukal Experiment Station. 451 



SINUATE PEAR BORER. 



(Agrilus sinuatus Oliv.) 



Description. — This insect was recently introduced into this 

 country from Europe. It has become seriously injurious in 

 some parts of the eastern United States. It makes long zig-za.^ 

 galleries between the bark and wood, finally girdling and killing 

 the tree. It is said to live two years in the larval stage. The 

 larva is slender, and has the first segment back of the head much 

 enlarged. The adult is a small, slender beetle. The eggs are laid 

 on the bark of the tree. 



Treatment. — ^AVhen a tree becomes infested it is very difficult 

 to get the borers out, and it is usually impractical to attempt to 

 do so. As preventive measures some good may be done by plac- 

 ing mechanical obstructions on the trunks, such as tarred paper 

 wound about the trunk, or wire netting; the object being to pre- 

 vent the adult from depositing eggs in the bark. Whitewashing 

 the trunk with ordinary whitewash to which enough Paris green 

 has been added to tinge it slightly, or with a strong soap wash, 

 one pound of whale oil soap to one gallon of water, has been recom- 

 mended. The trunks should be kept covered with one of these 

 washes during May and June. 



PEAR SLUG. 



{8elandria cerasi Peck.) 



Description. — The adult insect is a small, dark-colored, four- 

 winged fiy. The slugs make their appearance in the latter part 

 of May or early Jime. At first light in color they soon become 

 darker and are covered with an abundance of slime. The slugs 

 feed on the upper surface, skeletonizing the leaves, and where very 

 abundant they cause serious injury. Leaves that are badly injured 

 wither and fall. 



Treatment. — If upon exaniination it is found that the insects 

 are likely to appear in sufficient numbers to cause much damage, 

 no time should be lost in spraying the trees with Paris green. If 

 the trees are being treated for fungous diseases the Paris green 



