. Eastern forest insects. Forest insects. stumps, or logs escape attack. Large amounts of white downy- frass is evidence of attack. Platypus quadridentatus (Oliv.) occurs throughout the South and north to West Virginia and North Carolina. Various species of hardwoods, especially the oaks, are most commonly attacked. Magnolia seedlings have also been severely damaged in a nursery in Florida. Adults are dark reddish-brown and about mm. long. The front of the head is shallowly and densely punctured and sparsely clothed with moderately long hairs. The pronotum is longer than broad, and, in the
. Eastern forest insects. Forest insects. stumps, or logs escape attack. Large amounts of white downy- frass is evidence of attack. Platypus quadridentatus (Oliv.) occurs throughout the South and north to West Virginia and North Carolina. Various species of hardwoods, especially the oaks, are most commonly attacked. Magnolia seedlings have also been severely damaged in a nursery in Florida. Adults are dark reddish-brown and about mm. long. The front of the head is shallowly and densely punctured and sparsely clothed with moderately long hairs. The pronotum is longer than broad, and, in the female, it bears two large pits just behind the middle. The third, fifth, and seventh interspaces of the elytra are produced into toothlike processes on the elytral de- clivity of the male. Two large tuberosities also occur on the lower edge of the declivity, and two hook-like spines are on the fourth abdominal segment. Platypus compositus (Say) occurs throughout the Southern States northward to southern New York and southern Illinois. It breeds in a wide variety of deciduous trees such as hickory, pecan, birch, poplar, oak, chestnut, basswood, elm, beech, sweetgum, sourgum, magnolia, persimmon, and cypress. Recently felled or girdled cypress is often seriously damaged (fig. 103). Adults are light reddish-brown and about mm. long. The front of the head is densely punctured above, and there are two centrally lo- cated pits just behind the middle of the pronotum. The first, third, and seventh interspaces of the elytra of the male are pro- duced into small tubercles on the declivity. The declivity also bears two large tridentate teeth at the outer apical angle. Control of Ambrosia Beetles.—Ambrosia beetle control is largely a matter of prevention of damage to recently cut logs through the regulation of woods practice, and in the proper hand- ling of milled products (41). Control for several months has also been obtained by spraying with an approved insecticide (UOU, 405). C
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
