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Comparative Studies On The Components Of Innate Partial Resistance To Venturia Inaequalis (Cke) Wint In Nine Apple Cultivars, Cheryl A. Smith
Comparative Studies On The Components Of Innate Partial Resistance To Venturia Inaequalis (Cke) Wint In Nine Apple Cultivars, Cheryl A. Smith
Doctoral Dissertations
The components of partial resistance to Venturia inaequalis and the expression of resistance were quantified in nine apple cultivars ('Delicious,' 'McIntosh,' 'Stayman,' 'Mutsu,' 'Paula Red,' 'Ida Red,' 'Golden Delicious,' 'Spartan,' and 'Rome') under field conditions. Ascospore productivity was influenced by cultivar, and was greatest on 'Rome' (476 spores/cm$\sp2$ leaf), but cultivar did not affect the rate of ascospore maturation significantly.
Relative conidium productivity/lesion was influenced by cultivar, and ranged from 30,126 conidia/lesion on 'Golden Delicious' leaves to 4,443 conidia/lesion on 'Delicious' leaves. The infectious period (length of time conidia are produced) was longest on 'Golden Delicious' (94 and 68 days) …
Discards Of Commercial Fish Species In The Gulf Of Maine Groundfish And Shrimp Fisheries, Richard Langan
Discards Of Commercial Fish Species In The Gulf Of Maine Groundfish And Shrimp Fisheries, Richard Langan
Doctoral Dissertations
A three part analysis of discarding of commercial fish species in the Gulf of Maine trawl fisheries was conducted from 1983 through 1992. Abstracts for each part of the dissertation are:
Part 1. The objectives of the research were to quantify commercial trawler discards of American plaice, witch flounder, yellowtail flounder, and winter flounder, and to examine variables that potentially influence discard rates. Data were obtained from 135 tows in 6 areas of the Gulf of Maine. Four different types of trawls were used. Mean discard percentages per tow, on a weight basis, were 25, 18, 13, and 5% for …