883 



ground (though not so deep) and hibernates in the pupa con- 

 dition. The moth of the Fall Web Worm is white or spotted 

 (white and black). 



If young trees are carefully watched, the small webs of 

 the young caterpillars may be removed from the trees before 

 much damage is done. Sometimes the larger webs are de- 

 stroyed with burning rags saturated with coal oil and tied on< 

 the end of a long pole. Asbestos may be used in the place of 

 rags. The arsenite sprays used to combat the pecan and 

 walnut caterpillars, will be equally effective upon the Fall 

 WebWoim. A number of parasites live upon and destroy 

 great numbers of caterpillars. 



Large caterpillars, those of a species ot Catacola moth, 

 may occur in sufficient numbers upon pecan trees to do serious 

 damage. The larvae have the habit, especially when nearly 

 grown, of hiding during the day in the crevices of the bark. 

 The grey color of the caterpillar resembles the color of the 

 bark so much that it is not an easy matter to find them while 

 hiding in the crevices. The best time to collect these caiter-- 

 pillars upon the trunk is during or after a rain when the grey 

 caterpillars show more distinctly in contrast to the damp 

 and darkened bark. 



UPON THE TRUNK AND BRANCHES. 



The trunks of pecan trees are frequently attacked by the 

 Hickory borer (Cyllene pictus) and other forms closely akin. 

 Injured trees are more susceptible and the greatest care 

 should be exercised during cultivation not to injure the trunks. 

 Should injury occur, crude petroleum should be painted over 

 the injured parts. A common point of attack of pecan borers 

 is in the forks of the main limbs. These should be carefully 

 guarded and protected. 



Most pecan growers are familiar with the "twig girdler" 

 which so seriously prunes young and budded trees. The cul- 

 prit is a grey colored beetle about three-fourths of an inch 

 long. The eggs are laid in the part removed by the beetle, 

 and the larvae or grubs live in the separated twigs for as long: 

 as a year. 



