17 



THE MORE COMMON SHADE AND ORNAMENTAL TREES 

 AND PLANTS LIABLE TO INSECT INFESTATION 



The Pepper 



This beautiful tree is unfortunately a very persistent Black Scale 

 breeder in many localities where other black scale infested trees 

 are near it, and its size makes its treatment difficult. Spraying, 

 the only practical method, seems very ineffectual, and probably the 

 best course with larger trees, is to defoliate them by trimming off 

 all branches under two inches in diameter. If this is done late in 

 the fall or early in the winter when shade is not required, the new 

 shoots will produce the shade again by the following summer, and 

 the scale will be completely destroyed, for the time at least. 



The Black Acacia 



The above name, while not scientifically correct for the Black 

 Wattle (acacia melanoxylon), is the one commonly used here. 

 (Black Wood is better.) Oleander Scale and Greedy Scale are 

 the important insect enemies of this fine shade tree, and both 

 are easily controlled by a good emulsion spray. Cottony Cushion 

 Scale (Icerya purchasi), though often getting started on this tree, 

 is soon completely controlled by its lady-bird enemy (Novius car- 

 dinalis) and a chalcid parasite (Lestophonus iceryae), and need no 

 attention. 



The Camphor 



This most beautiful dwarf street and ornamental tree, while easily 

 grown and very hardy as to injury, has some serious insect and 

 disease enemies. The Red Scale will kill it sometimes if not 

 checked. The Greedy Scale has a love for it, and a peculiar blight 

 of the tender new growth and sometimes of the older leaves checks 

 its thrift and often makes it quite unsightly for a time. The 

 former must be controlled by sprays and the latter is a problem 

 as yet unsolved. 



The Sterculia or Bottle Tree 



Very easily grown and free from pests and disease except the 

 Greedy Scale, which often becomes quite thick on the bark, to 

 the decided injury of the tree. 



