. Eastern forest insects. Forest insects. F-506694 Figure 1.—Galls of the maple bladder-gall mite, Vasates quad- 7'ipedes, on leaf of maple. pine bud mite, Phytoptus pini Nal.—causes the yellowing and dropping of pine needles. Aceria phloceoptes (Nal.)—deforms fruit spurs and produces woody galls on plum. Nalepella tsugi- foliae Keifer—has been reported damaging hemlock in nurseries in New York. Trisetaceus cupressi (K.)—attacks southern red cedars, causing distortion and deformation of young trees. Mites of the family Sarcoptidae are skin parasites of warm blooded animals. The itch mite, Sarc
. Eastern forest insects. Forest insects. F-506694 Figure 1.—Galls of the maple bladder-gall mite, Vasates quad- 7'ipedes, on leaf of maple. pine bud mite, Phytoptus pini Nal.—causes the yellowing and dropping of pine needles. Aceria phloceoptes (Nal.)—deforms fruit spurs and produces woody galls on plum. Nalepella tsugi- foliae Keifer—has been reported damaging hemlock in nurseries in New York. Trisetaceus cupressi (K.)—attacks southern red cedars, causing distortion and deformation of young trees. Mites of the family Sarcoptidae are skin parasites of warm blooded animals. The itch mite, Sarcoptes scabei (DeG.), is a well- known species. It attacks man and causes severe itching as it bur- rows into the skin. The family Trombiculidae contains the notorious red bugs or chiggers. The common chigger in eastern United States is the first instar larva of the species, Eutrombicula alfreddugesi (Ouder- mans). In its later stages, it feeds on other insects, snakes, birds, lizards, and rodents. When it attaches itself to the skin of man and insects, it inserts its mouth parts to feed, causing intense itching and sores. Heavy attacks may cause fever, and secondary infections may occur. Chiggers are often abundant in the forests of the Central and Southern States and along the Atlantic Sea- board north to New Jersey. Many other species of mites occur in association with bark beetles,3 and some are known to be parasitic. So far, very little information is available on their effectiveness in natural con- trol of the beetles. In some instances, it may be substantial. TICKS.—Ticks are all parasitic, chiefly on mammals, birds and reptiles. All American species have a number of features in com- mon, such as large size, a piercing hypostome with recurved teeth, and chelicera with lateral teeth on the movable digits. Some ticks are mostly covered by a hard dorsal plate called the scutum; in others this hard plate is absent. 3 Unpublished manuscript by J. C. Moser and L. M.
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
