PLANT DISEASES AND PESTS 379 



emerges from the apple to find a favorable place to go into 

 the pupa stage. During the pupa stage, wings and other 

 adult parts of its body are developed. It comes out an 



APPLES RIGHT FOR 



SPRAYING CODLING MOTH LARVA 



To kill the codling moth. And its work. 



adult in time to produce a second generation in the 

 apples that escaped the first attack. 



Remedy -- Spray apple trees with a poison such as 

 arsenate of lead just as the petals are falling from the 

 blossoms, forcing the spray well into the blossom end of 

 the apple. Spray again about the middle of the summer, 

 if necessary, when the second generation of the moth 

 appears. 



QUESTIONS AND EXERCISES 



1. When is a plant a parasite? Name some parasites. What is 

 the plant called on which parasites grow? 



2. Examine the under side of some growing leaves for a yellow 

 substance. What is it? 



3. Give the life history of the apple rust. Examine some green 

 apple leaves and cedar trees to determine the various stages of the 

 apple rust. How can it be destroyed? 



4. Examine peach, plum, and cherry tree sfor brown rot, What 

 remedy can be used? 



