Life Sciences Commons^™

Trends In Overwintering Egg Populations Of A Pine Sawfly, Neodiprion Autumnalis, On Ponderosa Pine Sampled In January And December 1991 Near Ft. Meade In South Dakota, Judith E. Pasek, Willis C. Schaupp Jr

Judith E Pasek

In 1990 and 1991, a number of outbreaks of the pine sawfly, Neodiprion autumnalis, were reported in western South Dakota and eastern Wyoming. Near Ft. Meade in South Dakota, defoliation in 1990 was heavy at the center of the infestation and decreased to light defoliation at a distance of 1 mile from the center. Defoliation at the same location in 1991 appeared to range from heavy to moderate.

Three sites near Ft. Meade that were sampled in January 1991 were resurveyed in December 1991 to assess changes in overwintering egg populations and degree of defoliation and to determine the potential …

Populations Of Douglas-Fir Beetle In Green Trees Three Years After The Clover Mist Fire On The Clarks Fork Ranger District, Shoshone National Forest, Wyoming, Judith Pasek, Willis Schaupp

Judith E Pasek

Brood densities of Douglas-fir beetle (DFB), Dendroctonus pseudotsugae Hopkins, in green trees adjoining areas burned by the 1988 Clover Mist Fire varied by site, but averaged 8 per 36 sq. in. for bark samples at all sites examined during November 1991. Brood densities were much reduced from 1990 levels, but were similar to densities found in blackened trees in fall 1989. The reduction from 1990 levels was attributed to heavy winter mortality of brood caused by prolonged extreme cold temperatures. Most brood in fall 1991 samples was present in the callow adult stage, similar to 1989 samples, and in contrast …

Status And Trends Of Mountain Pine Beetle Populations In The Bear Mountain And White House Gulch Areas On The Harney Ranger District, Black Hills National Forest, South Dakota, Judith E. Pasek, Willis C. Schaupp Jr

Judith E Pasek

Increasing and epidemic populations of the mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae) were detected and evaluated in the southcentral Black Hills. Mortality of ponderosa pine, Pinus ponderosa Dougl. ex Laws., in the area increased each year since 1988 and was six times greater in 1991 than in 1989. Survey results indicate an average of 29 trees killed per acre by this bark beetle from 1989 through 1991 in the Bearhouse project area. Infestation is especially concentrated in the Bear Mountain Basin area, where between 27 and 103 trees per acre have been killed, and a large beetle population …

Mp92-63 Adult Corn Rootworm Management, Lance J. Meinke

University of Nebraska-Lincoln Extension: Historical Materials

The western corn rootworm (WCR), and the northern corn rootworm (NCR) are among the most economically important insect pests of field corn in the Unitd States. Crop losses and control expenses attributed to corn rootworms annually cost producers millions of dollars. Corn rootworm larvae can cause substantial injury to corn plants by feeding on corn roots.

This Extension circular covers these two corn rootworms, their population dynamics, management considerations, and research/emerging technologies.

Mp92-64 The Stable Fly: A Pest Of Humans And Domestic Animals, Gustave D. Thomas, Steven R. Skoda

University of Nebraska-Lincoln Extension: Historical Materials

Many species of flies are pests. Many people, if you were to ask them about flies, would be at least vaguely aware of the potential to flies to transmit disease organisms. But yet, for the most part, a fly is a fly is a fly. Sayings like "It must be about to rain, the house flies are biting" are still common and show a general need for more, readily accessible information, particularly about some of the pest flies.

Stable flies, obligate blood-feeders, are very important pests to the cattle industry and, at times, are pests to other groups (they're most …

G92-1108 Evaluating Corn Rootworm Soil Insecticide Performance, J. F. Witkowski, Lance J. Meinke, Gary L. Hein, Keith J. Jarvi

University of Nebraska-Lincoln Extension: Historical Materials

This publication describes a technique used to evaluate the relative performance of insecticides in protecting corn roots from feeding damage by corn rootworm larvae.

Insecticides applied at planting or cultivation time are commonly used in continuous corn to protect the roots from damage by western and northern corn rootworms.

Measuring the relative performance of these insecticides in protecting corn roots from rootworm larval damage is important.

G92-1094 Controlling External Swine Parasites, John B. Campbell, Barbara Straw

University of Nebraska-Lincoln Extension: Historical Materials

Mixing, safety, restrictions, and precautions for insecticides used to control external swine parasites.

Hog Lice and Mange Mites

External parasites of swine include the hog louse and two species of mange mites (the common itch mite and the less common hog follicle mite). Excessive scratching and rubbing by pigs nearly always indicate an infestation of hog lice or mange mites.

Hog lice and mange mites infest a high percentage of swine slaughtered at Midwest slaughter plants.

G92-1104 Getting Started In Beekeeping, Marion D. Ellis, Frederick P. Baxendale

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide provides information on beginning beekeeping in Nebraska.

Beekeeping in Nebraska

There are approximately 700 beekeepers in Nebraska operating about 115,000 colonies of bees. Annual honey production in the state ranges from 5 to 11 million pounds depending on weather conditions and available flora. The honey from each area is a unique blend of nectars from the available flora. In a good area under favorable conditions, a properly managed colony can produce 100 pounds or more of honey. The six-year average (1986-1991) for honey production per colony in Nebraska is 75 pounds.

Of far greater importance is the role …

Incorporating Pest Information Into Forest Planning: Personal Experience From The Black Hills, Judith E. Pasek

Judith E Pasek

Paper presented at the 40th Annual Western International Forest Disease Work Conference.