. Eastern forest insects. Forest insects. in the spring and feed for several weeks on the inner bark of pine branches and on the stems of seedlings and small trees. Adults developing from the overwintering larval and pupal stages appear in July and August. The life cycle may be completed in 1 or 2 years. The insect breeds beneath the surface of the bark on recently cut stumps and logs, and on the main stems or branches of dead or dying trees. Attacks occur on the tree from the roots up to branches as small as one-half inch in diameter. Attacks also occur at the root collar and on the lower ste
. Eastern forest insects. Forest insects. in the spring and feed for several weeks on the inner bark of pine branches and on the stems of seedlings and small trees. Adults developing from the overwintering larval and pupal stages appear in July and August. The life cycle may be completed in 1 or 2 years. The insect breeds beneath the surface of the bark on recently cut stumps and logs, and on the main stems or branches of dead or dying trees. Attacks occur on the tree from the roots up to branches as small as one-half inch in diameter. Attacks also occur at the root collar and on the lower stems of apparently healthy young trees. Eggs are deposited in pockets chewed through the bark by the female. Normally, a pocket contains only one egg, but frequently as many as four or five are found in one. The larvae feed either upward or downward or right or left from the site of the egg, usually following the grain of the wood. In large, in- fested material, they pupate in "chip cocoons" in the outer sur- face of the wood; in smaller diameter material, they pupate at the center of the stem. Damage is often severe in regions where there are large quan- tities of breeding material, such as fresh stumps in Christmas tree plantations and in stands under intensive management. .Be- cause of the scarcity of breeding material in natural pine stands, damage there is of little consequence. Damage in nurseries and plantations can be reduced by destroying breeding sites or render- ing them unsuitable for egg laying (250). The deodar weevil, Pissodies nemorensis Germ., occurs in the Southern States north to Pennsylvania and breeds in deodar cedar, imported Atlas cedar, cedar of Lebanon, and various species of pines. The adult is rusty-red to grayish-brown, has a long snout, and is about 6 mm . long (fig. 76). ~0k. / I t COURTESY OF DUKE UNIV. SCH. OF POKKST. Figure 76.—Adult of the deodar weevil, Pissodes nemorensis. 212. Please note that these images are extracted from scanne
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
