Cucurbit Genetics Cooperative Report 6:70-71 (article 35) 1983 Y. Burger, H.S. Paris, H. Nerson, Z. Karchi and M. Edelstein Division of Vegetable Crops, Agricultural Research Organization, Newe Ya’ar Experiment Station, P. O. Haifa, Israel Silver mottling of leaves is a widely known characteristic of cultivated Cucurbita which is controlled oligogenically. This mottling generally occurs as […]
Month: July 1983
Effect of Fruit Thinning on Dry Matter Accumulation and Variability in Cucurbita maxima Winter Squash
Cucurbit Genetics Cooperative Report 6:72-73 (article 36) 1983 Deborah Evans and Brent Loy University of New Hampshire, Durham, NH 03824 In breeding efforts to develop small-fruited bush strains of C. maxima winter squash, we have encountered problems in obtaining strains with consistently high dry matter in the pericarp of fruit. Preliminary observations suggested that this […]
A Report of Cucurbitacin Poisonings in Humans
Cucurbit Genetics Cooperative Report 6:73-74 (article 37) 1983 J. E. Ferguson, D. C. Fischer, and R. L. Metcalf Departments of Entomology and Horticulture, University of Illinois, Urbana-Champaign, IL 61801 The tetracyclic triterpenoid cucurbitacins, bitter substances of the Cucurbitaceae, are highly toxic to mammals with intraperitoneal median lethal dose values for pure Cucs in the mouse […]
Intense Bitterness in Commercial Zucchini
Cucurbit Genetics Cooperative Report 6:75-76 (article 38) 1983 Mark E. Herrington Redlands Horticultural Research Station, Ormiston, Qld. 4163, Australia Twenty-two cases of food poisoning associated with intensely bitter zucchini were recorded by Queensland health authorities between November, 1981 and December, 1982. In case studies symptoms of illness were apparent 1 to 2 hours after consumption. […]
Overview – The Cucurbita Species
Cucurbit Genetics Cooperative Report 6:77-78 (article 39) 1983 Miguel Holle CIAT, Cali, Columbia The genus Cucurbita is spread through America. Several species (C. moschata, C. maxima, C. pepo, C. mixta, C. ficifolia) are cultivated in Latin America. Cultivation is mostly in a few plants usually within a field of corn with or without other plants. […]
Controlling Cucumber Beetles and Corn Rootworm Beetles with Baits of Bitter Cucurbit Fruit and Root
Cucurbit Genetics Cooperative Report 6:79-81 (article 40) 1983 R. L. Metcalf, J. E. Ferguson, Dan Fischer, Richard Lampman and John Andersen Departments of Entomology and Horticulture, University of Illinois, Urbana-Champaign, Illinois 61801 Wild species of Cucurbitaceae are well known for producing the intensely bitter oxygenated tetracyclic triterpenoids, the cucurbitacins (Cucs). These Cucs are kairomones for […]
Progress and Procedures in Breeding CMV Resistant C. pepo L.
Cucurbit Genetics Cooperative Report 6:82-83 (article 41) 1983 Henry M. Munger and Richard L. Washek Cornell University, Ithaca, NY 14853 After many years of attempting to use cucumber mosaic resistance derived from PI 176959, a C. pepo from Turkey, recent efforts have concentrated on C. martinezii which is proving a far better source of resistance. […]
Growth of Parthenocarpic and Seed-bearing Fruit of Zucchini Squash
Cucurbit Genetics Cooperative Report 6:84-85 (article 42) 1983 A. P. M. den Nijs and J. Balder Institute for Horticultural Plant Breeding, P. O. Box 16, Wageningen, The Netherlands Large differences in parthenocarpic fruit set amongst zucchini squash cultivars were reported (1). Selection for parthenocarpy was successful and a breeding line with high tendency to parthenocarpic […]
On Regreening of Cucurbita pepo L. Fruit
Cucurbit Genetics Cooperative Report 6:86-87 (article 43) 1983 A. Schaffer1 and C. D. Boyer2 Rutgers University, New Brunswick, NJ 08903 The effect of B on precocious yellowing of C. pepo fruits has been reported in detail (1). However, during our studies on the-pigmentation of C. pepo fruits (2) a number of significant observations regarding fruit […]
On Spotting of Cucurbita pepo L. Fruit
Cucurbit Genetics Cooperative Report 6:87-88 (article 44) 1983 A. Schaffer1 and C. D. Boyer2 Rutgers University, New Brunswick, NJ 08903 A number of C. pepo cultivars are characterized by fruits with either a “lace-like pattern” or subtle spotting (1). Even the dark-green zucchini squashes, when viewed closely, exhibit small light green specks throughout the surface […]