[12] ~Rhagoletis suavis~ Loew.
Lead arsenate, 2 to 4 pounds per 100 gallons of water, in combination with an equal quantity of hydrated lime is quite effective in destroying the adults of the walnut husk maggot when applied at the time they are present.
~Stinkbugs and leaf-footed bugs.~ There are a number of stinkbugs and leaf-footed bugs (Fig. 4), in addition to the species mentioned,[13][14] which are responsible for important injuries to pecans, filberts, and other nuts. These insects puncture the immature nuts with their beaks. The punctured areas become spongy, somewhat dark in color, and are bitter to the taste; on pecan the typical injury is referred to as black pit and kernel spot.
[13] ~Nezara vizidula~ (L.).
[14] ~Leptoglossus phyllopus~ (L.).
Crops of favorable host plants such as cowpeas and soybeans should not be planted in or adjacent to nut orchards subject to attack by these sucking bugs. In general, orchard sanitation should be practiced.
[Illustration: Fig. 6.—Galls produced by the pecan phylloxera.]
[Illustration: Fig. 7.—Injury to young pecan tree by the fall webworm.]
[Illustration: Fig. 8.—Larvae of the walnut caterpillar.]
[Illustration: Fig. 9.—Caterpillar of the hickory tussock moth.]