Digital Commons Network^™

Tb96: A Prediction Model For Maine's Potato Production, Alan S. Kezis, Michael Hammig, Marc Ribaudo

Technical Bulletins

For a state whose economy is significantly dependent on the health of the potato industry, a mechanism to forecast the expected level of production with a reasonable degree of accuracy could be a valuable tool for economic analysis and planning. The objective of this study is to develop an econometric model to predict production using selected data which are available well before the crop is harvested.

Tb89: Motor And Elective Activity Of The Duodenum Of Broilers, C. Mba-Mezoui, F. H. Bird, C. B. Chawan

Technical Bulletins

Recordings of pressure changes and electrical activity from the proximal small intestine of seven to eight-week-old unanesthetized chickens were made with chronically implanted transducers. The recordings were used to quantitate and determine the relationships among basic electric rhythm (BER), spike potentials (SP), and intestinal contractions (IC) of the duodenum. The omnipresence of the BER was demonstrated. SP were recorded whenever IC were detected. SP numbers and amplitudes were directly related to the strength of IC. Acetylcholine caused a general increase in the number and amplitude of both SP and IC. Epinephrine completely abolished both SP and IC. The results suggest …

Tb80: Scanning Electron Microscopy Of Insects: Techniques For The Novice, G. P. Hosking, N. P. Kutscha, F. B. Knight

Technical Bulletins

The scanning electron microscope (SEM) has been used to detail the morphology of small insects; however, it is often difficult for the novice to obtain acceptable results without time-consuming and costly experimentation. This brief paper outlines some of the techniques and problems encountered in an examination of the balsam bark beetle Pityokteines sparsus (Le Conte ) and the hymenopterous parasitoid Brachymeria intermedia (Nees). The information presented herein is mainly for the benefit of individuals wishing to use the SEM but having little or no experience concerning the special problems associated with the photography of insect specimens, and may form a …

B760: Characteristics Of Maine’S Resident And Non-Resident Hunters, R. Frederick Faunce, Alan S. Kezis, Gregory K. White

Bulletins

The Maine Department of Inland Fisheries and Wildlife has direct responsibility for freshwater fish and wildlife in the state. For the Department to properly administer its program and funds, it requires knowledge of the needs and desires of the citizenry it serves. With such information, the Department can better fulfill the governmental mandate that public funds be put to their highest and best use.

This bulletin reports some of the findings of a recent survey of residents and non-residents who purchased a 1976 Maine hunting license. It summarizes important characteristics of this group so that wildlife managers may better understand …

Tb92: The Aquatic Insects Of The St. John River Drainage Of Aroostook County, Maine, T. M. Mingo, David L. Courtemanch, K. Elizabeth Gibbs

Technical Bulletins

In September, 1977, an aquatic insect survey of the St. John River drainage was conducted. The objectives were to provide information on the existing fauna in the area of the proposed Dickey-Lincoln School Lakes hydro-electric project and to form the basis for predicting changes in the fauna should implementation of the proposed project take place. The results of that survey form the basis for this bulletin. The only additional information on the fauna of this river comes from a survey of organisms in the gut content of brook trout taken from the St. John River drainage between the Little Black …

Tb95: The Black Flies Of Maine, L. S. Bauer, J. Granett

Technical Bulletins

Black flies have been long-time residents of Maine and cause extensive nuisance problems for people, domestic animals, and wildlife. The black fly problem has no simple solution because of the multitude of species present, the diverse and ecologically sensitive habitats in which they are found, and the problems inherent in measuring the extent of the damage they cause. To improve the understanding of the nature of the black fly problem, an inventory of black fly species and habitats was made throughout the state. Previous black fly surveys in Maine have been geographically limited. In the present survey, black flies were …

Tb93: The Impact Of Price Deregulation And Changes In Assembly And Processing Costs On The Marketing Of Milk In Maine, Daniel Taylor, Gregory White, Homer Metzger, Alan Kezis

Technical Bulletins

Simulation of marketing situations is a means of better understanding the impact of various changes which may or may not come about in an industry. This report reflects the impact of several assumptions about market situations in the dairy industry, many of which depart from existing conditions. A major assumption was that of complete price deregulation. The results are not considered final, but are offered as indicators of the impact of changes which may take place in the marketing of mil k in Maine.

B759: Balsam Fir (Abies Balsamea (L.) Mill.) Phenology In Maine, T. M. Mingo, J. B. Dimond

Bulletins

Spring phenology of balsam fir in Maine was investigated during 1978. Multiple regression models based on climatic and geographic factors were developed for predicting fir phenology and accounted for a maximum of 52.6% of the observed phenological variation. Generalized maps depicting observed and expected phenology patterns are also presented.

B758: A Biomass Study Of The Thinning Potential And Productivity Of Immature Forest Stands In Maine, Harold E. Young, John H. Ribe, Donald C. Hoppe

Bulletins

The purpose of this study is to establish the degree of reliability that can be placed in biomass as a means of assessing thinning potential and site productivity of immature forest stands in Maine. The above ground biomass on 205 plots representing a variety of age classes in immature hardwood and softwood stands on meso, wet, and dry sites was cut and weighed including the standing dead trees on softwood sites. In addition, 45 point sample biomass plots were located and measured in mature all aged stands. Graphical analysis was used to relate stand characteristics to age by site and …

Tb90: The Effects Of Spraying With Sevin-4-Oil® On Insect Pollinators And Pollination In A Spruce-Fir Forest, E. R. Miliczky, E. A. Osgood

Technical Bulletins

The use of chemical insecticides is presently accepted as the most effective means of keeping damage by spruce budworm in Maine at an acceptable level. Unfortunately, broad-spectrum chemicals such as Sevin-4-oil® affect non-target organisms as well, and this can have serious consequences. The significance of these effects can only be determined by monitoring populations of non-target organisms and assessing the overall impact on the environment. This study was undertaken to determine the effects of operational spraying of carbaryl insecticide, Sevin-4-oil® on the abundance of insect pollinators in a spruce-fir forest.

Blueberry Progress Reports, Amr A. Ismail, John M. Smagula, Stewart Goltz, Paul Hepler, Alan Langille, G R. Benoit, W J. Grant, M G. Zuck, D C. Mcgee, Steven B. Johnson, Simon S. Leach, Howard Y. Forsythe Jr, Gordon E. Ramsdell, Cynthia L. Kahrmann

Wild Blueberry Research Reports

The 1978 edition of the Blueberry Progress Reports was prepared for the Maine Blueberry Commission and the University of Maine Blueberry Advisory Committee by researchers with the Maine Life Sciences and Agriculture Experiment Station and Maine Cooperative Extension Service at the University of Maine, Orono. Projects in this report include:

1. Weed Control in Blueberry Fields

2. Pruning of Blueberries

3. Integrated Management of Blueberry Fields

4. Factors Regulating Rhizome Initiation and Development in the Lowbush Blueberry

5. Effect of Plant-Water Stress on "Lowbush" Blueberry Growth Yield and Quality

6. Blossom Blight of Blueberries

7. Botrytis Blossom Blight of Lowbush …

B753: The Uptake Of Nutrients By Katahdin Potatoes As Influenced By Soil Moisture Regimes And Rates Of Fertilization, Gurbachan Singh Kalra, Roland A. Struchtemeyer

Bulletins

In Aroostook County, Maine, where the annual average rainfall is 35-40 inches, it is generalized by many that moisture is not a limiting factor in potato production. Weather data for Aroostook do, however, show frequent periods of low rainfall during the growing season, and these periods do cause temporary moisture deficiencies in the crop. Struchtemeyer, based on irrigation research in Maine, showed that the potato plant needs approximately 1 inch of water per week during the growing season. From the 1936 to 1955 Maine Weather Records, Pullen and Schrumpf (23) found that about 70 percent of the time, less than …