Efficiency of 3 single-harvest tests for evaluation of yield in pickling cucumber

Wehner, Todd C.

doi:10.1007/bf00021857

Cited by 10 publications

(13 citation statements)

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“…Fruits were harvested based on the three targeted harvest stages and were graded according to North Carolina standards. Grades 1, 2, 3, and 4 consisted of fruits 0 to 27 mm, 28 to 38 mm, 39 to 51 mm, and greater than 51 mm in diameter, respectively (Wehner 1986). Culls were oversize or misshapen (dogbone, nubbin, crooks, etc.)…”

Section: Methodsmentioning

confidence: 99%

Optimum planting density and harvest stage for little-leaf and normal-leaf cucumbers for once-over harvest

Schultheis¹,

Wehner²,

Walters³

1998

Can. J. Plant Sci.

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Schultheis, J. R., Wehner, T. C. and Walters, S. A. 1998. Optimum planting density and harvest stage for little-leaf and normalleaf cucumbers for once-over harvest. Can. J. Plant Sci. 78: 333-340. Optimum planting density and harvest stage were determined for once-over harvest of little-leaf and normal-leaf cucumbers. Three harvest stages (10, 25, and 50% oversize fruit) and four plant densities (37,000, 75,000, 150,000, and 300,000 plants/ha) were evaluated on little-leaf cucumber (H-19) and normalleaf cucumber (Sumter and Regal). Plant density did not affect skin color, seedcell size, and seed size in the cultivars evaluated. However, lighter skin color, larger seedcell, and larger seed size were detected at the later harvest stages in H-19. Harvest stage did not influence fruit skin color in Regal and Sumter, but seedcell size and seed size increased quadratically with harvest stage. H-19 produced the highest yield (tonne/ha) and dollar value ($/ha) followed by Regal and Sumter. Considering fruit quality and dollar value, the 10% harvest stage at 330 000 plants ha -1 was the optimum stage and density for once-over harvest of H-19 under North Carolina growing conditions. Higher yield occurred at the later harvest stages, but poorer fruit quality (increased seed and seedcell size, and a lighter skin color) was associated with those stages. Fruit quality and dollar value of Regal was best at the 10% harvest stage at approximately 240 000 plants ha -1 , while 200 000 plants ha -1 was best for Sumter.

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Section: Methodsmentioning

confidence: 99%

Optimum planting density and harvest stage for little-leaf and normal-leaf cucumbers for once-over harvest

Schultheis¹,

Wehner²,

Walters³

1998

Can. J. Plant Sci.

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“…A plot size of 1.2 × 1.5 m was found to be optimum for yield evaluation for once‐over harvest of pickling cucumber cultigens harvested using paraquat (1,1′‐dimethyl‐4,4′‐bipyridinium ion; Swallow and Wehner, 1986). In cucumber, small‐plot, single‐harvest trials were found to be more efficient than large‐plot, multiple‐harvest trials (Wehner, 1986, 1989). Wehner et al (1984) recommended the use of paraquat to defoliate plots for efficient yield measurement in once‐over harvest trials.…”

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“…Fruit number was more highly heritable (0.17) than fruit weight (0.02) (Smith et al, 1978). Evaluation of yield in single‐plant hills was poorly correlated with multiple‐harvest yield in replicated field trials, indicating the necessity for testing in row plots (Wehner and Miller, 1984; Wehner, 1986). In addition, greenhouse evaluation for yield based on fruit number on single plants was not correlated ( r = 0.09 to 0.15) with yield at two field locations (Nerson et al, 1987).…”

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“…Once‐over harvest trials having three replications were recommended for maximum efficiency to determine which cucumber lines should be tested further in multiple‐harvest trials (Wehner and Miller, 1984; Wehner, 1986). A plot size of 1.2 × 1.5 m was found to be optimum for yield evaluation for once‐over harvest of pickling cucumber cultigens harvested using paraquat (1,1′‐dimethyl‐4,4′‐bipyridinium ion; Swallow and Wehner, 1986).…”

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Screening the Cucumber Germplasm Collection for Fruit Yield and Quality

Shetty

Wehner

2002

Crop Science

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total area and production of slicing cucumber for 1997 was 9760 ha with a production of 202 514 Mg (USDA, Yield of cucumber (Cucumis sativus L.) in the United States has1998). Cucumber is the second most important vegetanot been significantly increased during the last two decades. Our objective was to evaluate the USDA cucumber germplasm collection ble crop in North Carolina, with a production area of for fruit yield and quality. All cucumber plant introduction accessions ≈9717 ha (USDA, 1997). Nationally, North Carolina from the USDA National Plant Germplasm System collection plus was ranked third in pickling cucumber production after check cultivars and breeding lines (hereafter collectively referred to Michigan and Florida, and fifth in slicing cucumber proas cultigens) were evaluated for early, total, and marketable yield duction after Georgia, Florida, Michigan, and California (number and weight), fruit quality rating, and days to harvest in during 1997 (USDA, 1997). small plots harvested once. All plants were treated with ethephonBreeding for yield in cucumber has been one of the (2-chloroethyl phosphonic acid) to make them gynoecious. Highly important objectives of many cucumber breeding prosignificant differences were observed among cultigens for all traits grams since the 1900s (Wehner, 1989). Yield of pickling evaluated in the study. Pickling type cultigens with the highest yield (fruit weight) were PI 209065, PI 326598, PI 137848, PI 285610, and cucumber has been improved by breeding for disease PI 264666. Slicing type cultigens with the highest yield were PI 234517, resistance (Peterson, 1975), as well as through the use PI 118279, PI 304085, and PI 512614. Beit Alpha type cultigens with of improved cultural practices (Cargill et al., 1975). Inthe highest yield were PI 167050, PI 163213, PI 532519, PI 211978, creased yield of cucumber cultivars has been due also to PI 357864, PI 183231, and PI 211117. Trellis type cultigens with the the improvement of qualitative traits such as gynoecious highest yield were PI 264228, PI 478366, PI 390262, PI 532524, PI sex expression, improved fruit color (improved percent-390267, and PI 532520. The USDA collection also exhibited a wide age marketable fruit), and direct yield improvement range in diversity for marketable fruit number, fruit weight, percent-(Wehner, 1989). age of culled fruit at harvest, fruit quality, and days to harvest. High The average yield of pickling cucumber in the United yielding cultigens identified in the study could be used to develop high yielding cultivars. Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27695-7609. The research was funded in part by the North Carolina Agricultural Once-over harvest trials having three replications Research Service (NCARS).

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“…Unordered plots of soybean are acceptable for trials in the northern United States, but not in the southern, where more foliage growth occurs (Hanson et al, 1961). Several technical aspects of cucumber yield trials have been investigated, including the most stable method of yield measurement for once-over harvest (Ells and McSay, 1981), the optimum plot size for single-and multiple-harvest trials (Smith and Lower, 1978;Swallow and Wehner, 1986), the optimum time to harvest plots once-over (Miller and Hughes, 1969), and the most efficient method for running trials to estimate yield in multiple-harvest trials (Wehner, 1986;Wehner and Miller, 1984). Although guard rows should be used around the outside of the trial to provide competition for the plots on the edges of the experiment, it is unclear whether bordered plots are required to obtain proper estimates of cucumber yield for monoculture conditions.…”

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Yield of Cucumbers in Multiple-harvest Trials with Dissimilar Genotypes in Border Rows

Wehner¹,

Miller²

1990

HortSci

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Cultigens frequently are tested for eventual monoculture production conditions in trials with different cultigens in adjacent rows. We determined the effect of using different cultigens of pickling and fresh-market cucumber (Cucumis sativus L.) in bordered (three-row) and unordered (l-row) plots. Cultigens contrasted in characteristics important in competitive effects: plant architecture (tall vs. dwarf), anthracnose resistance (susceptible vs. resistant), and sex expression (monoecious vs. gynoecious). In all four test years, there was no significant interaction of border with center row in unordered vs. bordered plots, with three exceptions: there was a significant reduction in yield of M 21 in 1982 when bordered by `Calypso' (a large-vined genotype), and a reduction in yield of `Southern Belle' in 1984 when bordered by `Calypso' or SMR 58. In most cases, there was an increase in yield if the border genotype had short vines. We concluded that. in most cases, trials can be run using unordered plots without significant effect or yield.

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Efficiency of 3 single-harvest tests for evaluation of yield in pickling cucumber

Cited by 10 publications

References 5 publications

Optimum planting density and harvest stage for little-leaf and normal-leaf cucumbers for once-over harvest

Optimum planting density and harvest stage for little-leaf and normal-leaf cucumbers for once-over harvest

Screening the Cucumber Germplasm Collection for Fruit Yield and Quality

Yield of Cucumbers in Multiple-harvest Trials with Dissimilar Genotypes in Border Rows

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