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Chen-Yu Lin, Kan-Shu Chen, Hsuan-Ping Chen, Hsiang-I Lee and Ching-Hsiang Hsieh

Cauliflower ( Brassica oleracea var. botrytis ) is a prominent commercial vegetable worldwide. The aesthetic appearance of cauliflower curd is the primary factor determining its market value. The curd is composed of undifferentiated inflorescences

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Carlos Campillo, M.I. García, C. Daza and M.H. Prieto

°50' W) of Extremadura (Spain); the soil was a slightly acid sandy-loam. The trial consisted of rotating two horticultural crops: cauliflower and processing tomato. The terrain was prepared in 1.5-m wide beds and was not modified over the rotation period

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Rachel A. Kreis, Holly W. Lange, Stephen Reiners and Christine D. Smart

In New York, cauliflower production was estimated at a value of $2.6 million on a total of 470 acres in 2014 [ U.S. Department of Agriculture (USDA), 2015a ]. Although the majority of cauliflower production occurs in California and Arizona, there is

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C. Alt, H. Kage and H. Stützel

. We thank H.-J. Wiebe for detailed information about his cauliflower development model as well as A. van der Werf for helpful comments on the manuscript. Technical assistance of I. Lippert and E. Diedrich is gratefully acknowledged.

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Suzanne O’Connell and Robert Tate

expand crop rotation options (Celia Barss, Nicholas Donck and Jay Payne, personal communication, Summer 2015). The National Farmers Market Directory also reports the rapid growth of winter markets ( USDA, 2012b ). Open-field broccoli and cauliflower are

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Thomas Walters and Elizabeth Earle

Cauliflower protoplasts with male fertile and Ogura male sterile cytoplasm were fused. Organelle reassortment and recombinant mitochondria were found in calli and plants regenerated from the fused protoplasts. Pretreatment (gamma-irradiation or iodoacetate) and protoplasm source (leaf or hypocotyl tissue) were manipulated in a series of fusions to determine their effects on organelle segregation. Some regenerated plants appear to combine Ogura male sterile mitochondria with normal Brassica chloroplasts. Plants with this organelle combination should be free of the cold temperature chlorosis due to incompatibility between the Brassica nucleus and the radish chloroplasts of the Ogura cytoplasm. These plants may have potential for improved cauliflower hybrid production.

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Aki Kubota, Thomas L. Thompson, Thomas A. Doerge and Ronald E. Godin

This study was conducted to evaluate the accuracy of sap analysis using a portable nitrate ion meter for cauliflower (Brassica oleracea L. Botrytis Group, cv. Candid Charm) petiole nitrate determination. The relationship between NO3-N concentration in fresh petiole sap and in dried petiole tissue was studied for cauliflower grown in southern Arizona during the 1993–94 and 1994–95 growing seasons. Experiments were factorial combinations of three water rates and four N rates, both ranging from deficient to excessive. Petioles were collected throughout each season and were split for analysis of sap NO3-N and dried petiole NO3-N. Linear correlations between the two methods were similar in both seasons, with no consistent effect due to water application rate or crop maturity. Therefore, a single regression equation was derived: petiole sap NO3-N (mg·liter–1) = 0.047 × dry petiole NO3-N (mg·kg–1) + 218 (r2 = 0.772). This equation can be used to relate sap test measurements to existing guidelines for NO3-N concentrations in cauliflower petioles. These results suggest that the quick sap test, using the portable nitrate ion meter, is a valuable technique for monitoring N status of cauliflower.

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Regina P. Bracy, Richard L. Parish and E.B. Moser

Field studies were conducted in Fall 1991 and 1992 to determine 1) if cauliflower (Brassica oleracea L. Botrytis Group) could be precision-seeded to a stand without subsequent thinning and 2) the optimum seed spacing necessary to directly seed cauliflower to a stand. Seed spacings of 10, 20, and 30 cm at one seed per hill and 30 cm at two seeds per hill were evaluated for effect on yield, head weight, plant population, and early harvest percentage. As evaluated in the laboratory, seeder precision (accuracy) was good in regard to seed counts and spacing measurements at the various seed spacings. In the field, seeder precision varied in distribution patterns among seed spacings and years. Cauliflower directly seeded at one seed per hill and a 20-cm spacing produced yields and head weights similar to cauliflower seeded 10 cm apart and thinned to 30 cm—the seeding method currently used by some commercial operators.

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R.P. Bracy, R.L. Parish and E.B. Moser

Field studies were conducted in Fall 1991 and 1992 to determine if cauliflower (Brassica oleracea L. Botrytis Group) could be precision seeded to a stand without subsequent thinning and what the optimum seed spacing necessary to directly seed cauliflower to a stand. Seed spacings of 10, 20, and 30 cm at one seed per hill and 30 cm at two seeds per hill were evaluated for effect on yield, head weight, plant population, and early harvest percentage. As evaluated in the laboratory, seeder precision (accuracy) was good with regard to seed counts and spacing measurements at the various seed spacings. Seeder precision evaluated in the field varied in distribution patterns among seed spacings and years. Cauliflower was successfully precision seeded to a stand without thinning during 2 years of fall plantings. Cauliflower directly seeded at one seed per hill and a 20-cm spacing produced total and average head weights similar to cauliflower seeded 10 cm apart and thinned to 30 cm—the seeding method currently used by some commercial operators.

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Denise V. Duclos and Thomas Björkman

plants has been difficult, because they may occur simultaneously in different regions of a small meristem. The large meristem size, synchronized development, and eventual developmental arrest in cauliflower and broccoli inflorescences allow greater