510 



ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 



Fig. 1. Rouud-IIeaUed Apple Tree Borer. Larva 

 and female beetle. (After Chittenden) 



Spotted Apple Tree Borer 



Saperda cretata Newm. 



Related to the round-headed borei' and 

 similar in appearance except that it has 

 two white spots on each wing case. 



The species is quite widely distributed 

 having been found from Michigan to 

 Texas. 



Remedies the same as for round-headed 

 borer. 



Bronze Apple Tree WeeTil 



Magdalis aenescens Lee. 



H. F. Wilson 



Like many of the common Insects found 

 in Oregon, this insect appears to be a 

 native of the Northwest, and has only 

 been reported from Oregon, Washington 

 and British Columbia. When first no- 

 ticed, it was reported as destroying whole 

 apple orchards, but later observations 

 show that most of the feeding occurs in 

 the bark. In many instances the bark 

 appears to be dead before the weevils 



Fir. ]. The Bronze Apple Tree Weevil : show- 

 ing egg cells Id bark o( apple. (Original) 



make their egg punctures, but it has also 

 been noticed that healthy bark affords 

 suitable places for egg deposition and 

 several growers in the Willamette valley 

 report serious injury to apple trees. 



It one notices the egg cells, as shown 

 in Fig. 1, and cuts away the bark, the 

 larval galleries can be easily traced to 

 where the larvae are feeding. 



The egg cells are made by the female 

 weevil, which eats out circular burrows 

 to a depth of .08 inch. The eggs are 

 then deposited singly in a few of the 

 pits and the young white larvae hatch 

 from these in a week or two. They feed 

 and develop in these burrows until fall, 

 when the larvae hibernate over, pupate 

 in the spring and change to adults. 



The adult insect is an elongate bronze 

 black beetle, measuring about one-fifth 

 inch in length. 



Methods of Control 



Careful examination of trees in locali- 

 ties where this insect is found and cut- 

 ting out the infested areas appears to be 

 the most satisfactory method for combat- 

 ing this pest. 



Brown Tall Moth 



Euproctis chrysorrhoea Linn. 



H. F. WlLSON 



Accidently introduced into this country 

 along in the nineties on nursery stock 

 imported from Holland: the brown tail 

 moth has become one of our worst insect 

 enemies of orchard, forest, ornamental 

 and shade trees. 



Not now present in the Northwest but 

 over wintering nests have been brought 

 in on nursery stock and there is danger 

 of its becoming a pest. 



The eggs hatch during August and the 

 larvae live over winter in nests of leaves 

 drawn together by silken threads. The 

 eggs are globular in shape and quite 

 small; they are laid in masses on the 

 under side of the leaves along in late 

 July and early August. Each mass con- 

 tains approximately 300 eggs, is brown 

 in color and covered with numerous 

 brown hairs taken from the body of the 

 moth. The egg masses measure two- 

 thirds of an inch in length by one-fourth 



