XI 



THE INSECT CAMPAIGN 



There are about 300 dift'ereiit species of insects that 

 have gone on record at one time or another as attack- 

 ing- the apple tree or fruit in some way. Of these per- 

 haps 100 have at times done real damage. Taking the 

 country at large, however, and one year with another, 

 the number of serious apple enemies can be calculated 

 at less than a dozen. It is proper and even necessary 

 to keep an eye open for some of these less important 

 pests, for occasionally one or another comes forth in 

 large numbers in some particular locality and plays 

 havoc with the apple industry. 



Those insects which may be regarded as permanent 

 factors in the apple-growing business are the San Jose 

 scale, the codling moth, the apple maggot, the forest 

 tent caterpillar, the fall web worm, and the b.-rers. 



San Jose Scale is undoubtedly one of the worst in- 

 sects known in those districts where it has become es- 

 tablished, and it has become established over a wide 

 range of country. Eventually all the apple-growing 

 sections will find the scale in their programs. On the 

 whole we may as well understand that the scale is here 

 to stay and that we shall have to fight it. 



For some years nursery inspection, quarantine and 

 fumigation has been looked on as a means of con- 

 trolling the spread of the scale. They have unques- 

 tionably contributed somewhat to this end. Nursery 

 inspection in some states has 'always been rigid and 

 thousands of infested trees have been destroyed which 



D9 



