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Full-Text Articles in Life Sciences
Tb205: Cost Of Supplemental Irrigation For Potato Production In Maine, David Silver, Ermias Afeworki, George K. Criner
Tb205: Cost Of Supplemental Irrigation For Potato Production In Maine, David Silver, Ermias Afeworki, George K. Criner
Technical Bulletins
This report presents estimated irrigation costs for potato production in Maine. The variability of the weather in Maine (particularly precipitation) has a large influence on crop yields and overall farm profitability. The use of supplemental irrigation on high-value agricultural crops can improve the economic situation of farmers who use this equipment efficiently. Costs considered in this report include capital costs (equipment, interest, water development (pond construction, permitting, engineering), and operating and maintenance costs (labor, power, repair).
Tb116: Integrated Systems For Managing Potatoes In The Northeast, G. B. White, S. S. Lazarus
Tb116: Integrated Systems For Managing Potatoes In The Northeast, G. B. White, S. S. Lazarus
Technical Bulletins
This technical bulletin presents the results of a research project developed to determine the feasibility of using an integrated pest management (IPM) system to improve economic and environmental benefits for the Northeast region. Research was conducted to develop and evaluate IPM techniques. These techniques were then tested, improved, and implemented in pilot programs on commercial potato farms in Suffolk County and Steuben County, New York, and Aroostook County, Maine.
Tb111: An Examination Of Alternative Investment Strategies For Potato Market Improvement Funds, Raymond J. Nowak, Alan S. Kezis
Tb111: An Examination Of Alternative Investment Strategies For Potato Market Improvement Funds, Raymond J. Nowak, Alan S. Kezis
Technical Bulletins
The primary objective of this study was to implement Potato Market Improvement Fund policy objectives and industry goals, using current production, storage, and packing operation data, to suggest alternative investment strategies for PMIF dollars.
Tb96: A Prediction Model For Maine's Potato Production, Alan S. Kezis, Michael Hammig, Marc Ribaudo
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.
Tb85: A New Potato Scab Problem In Maine, F. E. Manzer, G. A. Mcintyre, D. C. Merriam
Tb85: A New Potato Scab Problem In Maine, F. E. Manzer, G. A. Mcintyre, D. C. Merriam
Technical Bulletins
The scientific literature is filled with conflicting reports on the development of the common scab disease of potatoes and its causal organism. One unresolved question is soil reaction, once thought to be the answer in controlling this disease. Scientific studies an d practical experience over a long period had shown that acid soils having a pH of approximately 5.3 or below usually did not support common scab development, though sporadic and unexplained reports of disease occurrence in these soils were observed. In the late 1950s, however, such reports became more frequent in Maine and before the mid-1960s, losses relate d …
Tb83: Insecticidal Control Of Potato Infesting Aphids In Northeastern Maine, Geddes W. Simpson, R. H. Storch
Tb83: Insecticidal Control Of Potato Infesting Aphids In Northeastern Maine, Geddes W. Simpson, R. H. Storch
Technical Bulletins
Aphid populations for the growing seasons of 1970, 1971, and 197 2 were variable. It is possible, however, to rate the efficacy of the various insecticides tested in controlling potato-infesting aphids in northeastern Maine. Soil applications of aldicarb and DS 15,647 and foliar application of acephate were the most effective materials tested. The insecticides phosmet (foliar) and phoxim (soil) did not provide much protection against potato-infesting aphids in these tests. Bayer 77,049, parathion, Penick SBP 1382, Sandoz-Wander 52,139 and Uniroyal 840 did not provide effective control of potato-infesting aphids at the rates used in these tests. All other insecticides tested …
Tb51: Seasonal History Of The Buckthorn Aphid And Suitability Of Alder-Leaved Buckthorn As A Primary Host In Northeastern Maine, W. A. Shands, Geddes W. Simpson
Tb51: Seasonal History Of The Buckthorn Aphid And Suitability Of Alder-Leaved Buckthorn As A Primary Host In Northeastern Maine, W. A. Shands, Geddes W. Simpson
Technical Bulletins
The buckthorn aphid, Aphis nasturtii Kaltenbach, is one of four species of aphids commonly infesting potatoes, Solarium tuberosum L., in Maine. It is widely distributed over the northeastern part of the United States and is a pest of potatoes elsewhere in the world, including parts of England and Europe. The other three species of potato-infesting aphids in Maine are the green peach aphid, Myzus persicae (Sulzer), the potato aphid, Macrosiphum euphorbiae (Thomas ) and the foxglove aphid, Acyrthosiphon solani (Kaltenbach).
Tb58: Further Evaluation Of Entomogenous Fungi As A Biological Agent Of Aphid Control In Northeastern Maine, W. A. Shands, Geddes W. Simpson, I. M. Hall, Corinne C. Gordon
Tb58: Further Evaluation Of Entomogenous Fungi As A Biological Agent Of Aphid Control In Northeastern Maine, W. A. Shands, Geddes W. Simpson, I. M. Hall, Corinne C. Gordon
Technical Bulletins
An intensive survey and study were made each year from 1952 through 1962 to determine seasonal abundance of living and dead diseased aphids by species on potatoes and to collect many of the infected specimens for exact diagnosis. Results of the study disclosed that the action of entomogenous fungi was outstanding in reducing the size of aphid populations on potatoes. This technical bulletin reports on the results of the continuance of the study from 1963 through 1969. However, the collection of dead, diseased aphids throughout the summer was done only from 1963 through 1966 ; thereafter, diagnosis was limited to …
Tb60: Survey Of Internal Parasites Of Potato-Infesting Aphids In Northeastern Maine, 1963 Through 1969, W. A. Shands, Geddes W. Simpson, Corinne C. Gordon
Tb60: Survey Of Internal Parasites Of Potato-Infesting Aphids In Northeastern Maine, 1963 Through 1969, W. A. Shands, Geddes W. Simpson, Corinne C. Gordon
Technical Bulletins
This technical bulletin reports the results of an annual survey conducted from 1963 through 1969 of parasitized aphids on potatoes in northeastern Maine, chiefly on Aroostook Farm, near Presque Isle. The authors discuss the role of parasites in control of aphids on potato plants not treated with insecticides and list the primary parasites and hyperparasites reared from potato-infesting species of aphids collected during the survey.
Tb56: Effects Of Differing Abundance Levels Of Aphids And Of Certain Virus Diseases Upon Yield And Virus Disease Spread In Potatoes, W. A. Shands, Geddes W. Simpson, Barbara A. Seaman, F. S. Roberts
Tb56: Effects Of Differing Abundance Levels Of Aphids And Of Certain Virus Diseases Upon Yield And Virus Disease Spread In Potatoes, W. A. Shands, Geddes W. Simpson, Barbara A. Seaman, F. S. Roberts
Technical Bulletins
In eight years during the period 1944 to 1954, a study was conducted on Aroostook Farm, Presque Isle, Maine, to develop ways of obtaining and maintaining varying levels of aphid abundance on potato plants. Methods for measuring aphid abundance and their effects on yield and virus transmission were devised. These techniques were then used to determine the effects of varying all-season levels of abundance of the aphids and of virus reservoirs of two potat o diseases upon yield of potatoes and the spread of leaf roll and spindle tuber in four varieties of potatoes. The results of that study are …
Tb57: Effects Of Cultural Methods For Controlling Aphids On Potatoes In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. J. Murphy
Tb57: Effects Of Cultural Methods For Controlling Aphids On Potatoes In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. J. Murphy
Technical Bulletins
A study was conducted at Aroostook Farm, near Presque Isle, Maine, 1954 to 1958, inclusive, to determine the effects of certain agronomic cultural practices designed to delay emergence of potato plants and to decrease their exposure to infestation by spring migrants. This technical bulletin reports the results of that study.
Tb54: Importance Of Arthropod Predators In Controlling Aphids On Potatoes In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. E. Wave, C. C. Gordon
Tb54: Importance Of Arthropod Predators In Controlling Aphids On Potatoes In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. E. Wave, C. C. Gordon
Technical Bulletins
From 1942 to 1969, concurrent studies were made to identify and assess the importance of biological agents affecting abundance of the potato-infesting species of aphids in northeastern Maine. These authors report the results of studies relating to arthropod predators of aphids on the potato crop, principally from 1952 through 1969.
Tb52: Seasonal Population Trends And Productiveness Of The Potato Aphid On Swamp Rose In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. E. Wave
Tb52: Seasonal Population Trends And Productiveness Of The Potato Aphid On Swamp Rose In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. E. Wave
Technical Bulletins
Studies were conducted in northeastern Maine to determine seasonal population trends and productiveness of the potato aphid on swamp rose. The results presented and discussed concern chiefly chronological and phenological aspects of the utilization of swamp rose as a primary host of the aphid; time-temperature developmental requirements of the aphid in spring; productiveness of the aphid in caged colonies on swamp rose in spring; population trends of the aphid on naturally occurring, undisturbed swamp rose in spring and in fall; populations of aphid eggs on swamp rose in November and again in mid-April of the following year; and a comprehensive …
Tb39: Canada Plum, Prunus Nigra Aiton, As A Primary Host Of The Green Peach Aphid, Myzus Persicae (Sulzer), In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. E. Wave
Tb39: Canada Plum, Prunus Nigra Aiton, As A Primary Host Of The Green Peach Aphid, Myzus Persicae (Sulzer), In Northeastern Maine, W. A. Shands, Geddes W. Simpson, H. E. Wave
Technical Bulletins
Studies were conducted to determine the role of Canada plum as a host of the green peach aphid in northeastern Maine and to assess its importance as a source of infestation by the aphid on potatoes. The results relate chiefly to chronological and phenological aspects of the use of Canada plum as a primary host of this aphid; temperature developmental requirements of the aphid on this plant in spring; productiveness of spring migrants of the aphid in thickets and in cages; interrelationships between fall aphid populations on foliage, and egg deposition and overwintering to naturally occurring aphid colonies in spring …
Tb6: Importance Of Entomogenous Fungi In Controlling Aphids On Potatoes In Northeastern Maine, W. A. Shands, Geddes W. Simpson, I. M. Hall
Tb6: Importance Of Entomogenous Fungi In Controlling Aphids On Potatoes In Northeastern Maine, W. A. Shands, Geddes W. Simpson, I. M. Hall
Technical Bulletins
This publication reports on field studies of aphid biology and of associated ecological factors made near Presque Isle, Maine. Results showed that, among the biological agents affecting aphid population trends from 1952 through 1962, entomogenous fungi were outstanding in reducing the size of populations of the potato aphid developing on potatoes treated with fungicides but not with insecticides. The potato aphid was most affected by fungi and the buckthorn aphid least affected by them. The green peach and foxglove aphids were intermediate. Predators exerted a noticeably adverse effect upon aphid population trends in two of the 11 years.
Tb5: Effects Of Factorially Combined Levels Of Sulfur And Magnesium On Potato Plants (Solanum Tuberosum), Harold W. Gausman, George O. Estes
Tb5: Effects Of Factorially Combined Levels Of Sulfur And Magnesium On Potato Plants (Solanum Tuberosum), Harold W. Gausman, George O. Estes
Technical Bulletins
Katahdin potatoes were grown in the greenhouse in 2-gallon, crocks containing a virgin Caribou loam soil. Factorially combined levels of S and Mg, each at an equivalent rate of 0, 10, 20, and 30 pounds per acre, were imposed as treatments for the first five of seven crops. The sixth and seventh crops of potatoes were grown primarily to further deplete the soil of S and Mg and to enhance or accentuate plant deficiency symptoms which occurred quite intensively during growth of the fifth crop of potatoes. The objective was to evaluate effects of factorially combined levels of sulfur and …
Tb3: Studies Concerning Effects Of Chloride And Potassium On The Nutrition Of Potato Plans, Solanum Tuberosum, Harold W. Gausman
Tb3: Studies Concerning Effects Of Chloride And Potassium On The Nutrition Of Potato Plans, Solanum Tuberosum, Harold W. Gausman
Technical Bulletins
To evaluate the premise that Cl- and other anions might influence tuber quality by affecting the esterification of inorganic phosphorus and subsequent energy transformations involving metabolic processes of carbohydrate synthesis or degradation, the author studied the effects of Cl ~ in relation to cations and anions on nutrient uptake and inorganic phosphorus transformations.