88 



POPULAR FRUIT GROWING. 



the roots it causes warty swellings and may kill the trees. Ic is 

 one of the most dangerous of all insect pests affecting the apple. 

 Remedies. — The best remedies for it when occurring on the 

 roots are as follows: Remove the earth about the crown for a 

 distance of about two feet and put on from four to seven pounds 

 of tobacco dust. Put back the soil and irrigate where practicable 

 to do so. Removing the soil from about the roots and apply- 

 ing hot water has been satisfactorily practiced. Bi sulfide 

 of carbon poured into holes made with a bar about the trees 

 has also been successfully used. In doing this, make the holes 

 about ten inches deep near the infested roots and then pour 

 three ounces of the bi-sulfide into each hole. Three or more 

 holes should be made about each tree. Young trees are often 

 destroyed by the woolly aphis but the old trees are seldom hurt 

 by it. 



Insects Injurious to the Pear. 

 Any of the foregoing insects referred to as attacking the 

 apple may also attack the pear except the woolly aphis, and the 

 same remedies should be used. In addition to these, the pear is 



attacked by the fol- 

 lowing in&ects: 



Pear Tree Slug 

 (Eriocampoa cerasij. 

 — These slimy look- 

 ing insects are hatch- 

 ed from eggs laid in 

 the tissues of the 

 leaves by a glossy, 

 black fly soon after 

 the leaves expand in 

 spring. When first 

 emerging from the 

 egg they are white 

 but soon become cov- 

 ered above with a 

 slimy brown matter 

 Fis. 34.— Pear Tree Slug, a.— Mature in- ^hat oo7Pq mit nf thP 

 sect, b and c— Larva, side and back view. ^"^^ °°^^^ 0""^ °^ ^'^^ 

 d.— Worms feeding on leaves partly skel- skin. The slug, when 

 etonlzed by them. 



