1742 



ENCYCLOPEDIA OF PRACTICAL HORTICULTURE 



house, where it is well graded and very 

 thoroughly cleansed and sterilized by 

 steam; it is then packed according to 

 size in boxes for the market. 



PRUNE DISEASES 



Prunes are subject to some of the same 

 diseases as plums, peaches and other stone 

 fruits. The reader will find diseases and 

 pests of prunes listed under these various 

 fruits. 



Bacterial Black Spot 

 Psendomonas pruni Sm. 



This disease has the same generic or- 

 igin as the crown gall but is widely differ- 

 ent in nature. It attacks the green fruits 

 which show conspicuous black-purple 

 sunken spots, sometimes as large as half 

 an inch in diameter. It has been ob- 

 served upon triflora plums only, and is 

 not serious. 



Bl.\ck Spot. See Scab under Peach 

 Pests. 



Leaf Curl. See Peach Diseases. 



Mushroom Root Rot. For description 

 of this disease see Apple Diseases. 



Prune Mushroom Root Rot. 



Peach Scab or Black Spot. See Peach 

 Diseases. 



PEUJfE I'ESTS 



Black Scale. See Apricot Pests. 



Brown Bay Moth 



Pseudohazis eglanterina Boisd. 

 (Family Saturniidae) 

 General Appearance 

 The eggs are salmon-colored and laid in 

 clusters around small stems or branches. 

 The larvae are dark or nearly black with 

 fine lateral red stripes and spots on the 

 dorsum. The bodies are covered with 

 long tufts of black and light-brown hairs. 

 When full grown they are a little over 

 two inches long. The chrysalids are 

 dark reddish-brown and about one inch 

 long. The adults are beautiful yellow 

 moths blended with red or salmon color 

 and regularly marked with black. The 

 thorax is deep orange; the dorsal half of 

 the abdomen is yellow and the central 

 half red. A black band encircles each 

 segment. The posterior end has a long 

 tuft of yellow and red hairs. The an- 

 tennae of the female are orange, and 

 brown in the male. The legs are yellow 

 with black spines. 



Life History 



The eggs are deposited in the spring of 

 the year upon various fruit trees, wild 

 trees and bushes. The young attack the 

 foliage, almost entirely defoliating the 

 plants. When full grown the larvae seek 

 the ground, where they pupate and thus 

 pass the winter, emerging early in the 

 spring as adults. These are often seen 

 flying during the day. 



Food Plants 



This species attacks a great variety of 

 both wild and cultivated trees and shrubs. 

 Prune trees have often been severely at- 

 tacked, the young larvae destroying the 

 first appearing buds. 



Control 



The egg masses are very conspicuous 

 and great numbers of them may be easily 

 destroyed by hand picking in the spring. 



Arsenical sprays applied when the lar- 

 vae become apparent are also effective. 



Natural Enemies 



Internal humenopterous parasites per- 

 form a very important role in checking 

 the ravages of this pest. Caterpillars are 

 often found with the cocoons of these 



