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Blair Buckley and Katharine Pee

Ease of pod detachment is an important consideration when selecting cultivars for mechanical harvest at the mature-green stage. Sixteen southernpea cultivars and breeding lines were evaluated for pod detachment force. The cultivars varied in pod detachment force. MN-13 had the largest detachment force with a measurement of 2.18 kg. Royal Cream had the smallest detachment force with a measurement of 1.2 kg. Pod length, pod diameter, pod weight, basal pod fill, and length of peduncle synapse was recorded for each pod sampled for detachment force. There was no clear association between pod detachment force and the five traits.

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Hong Chen, Greg McCollum, Elizabeth Baldwin, and Jinhe Bai

collected, AS and HLB, because it was not possible to find trees that qualified as HLB-B trees. Samples were taken on 19 Jan., 3 and 19 Feb., and 3 Mar. 2014 in the same manner as for ‘Hamlin’. Fruit detachment force. The FDF was measured using a digital

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Carl E. Motsenbocker and Kay P. Gersch

Field and greenhouse studies were conducted to examine fruit detachment force and plant parameters of two strains of Tabasco (Capsicum frutescens) at different stages of maturity. The detachment force of mature red `McIlhenny Select' at the fruit-receptacle detachment area was less than that of breaker and mature green fruit. `McIlhenny Select' separated cleanly at all stages of maturity. A wild type Tabasco strain `HP' did not abscise at the red mature stage; fruit detachment force was greater than that of `McIlhenny Select'. The detachment force of mature green and breaker `HP' fruit were similar to those of `McIlhenny Select' at the same stage of maturity. Fruit weight, length, and width of the two tabasco strains were not different. The utility of the `McIlhenny Select' and `HP' strains for physiological studies of pepper fruit abscission will be discussed.

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Carl E. Motsenbocker

Field and greenhouse studies examined the fruit detachment force (FDF) and fruit and pedicel characteristics of two lines of tabasco pepper (Capsicum frutescens L.) at several stages of maturity. The detachment force of red-mature `McIlhenny Select' fruit at the calyx-fruit detachment area was lower than that of less mature fruit stages. The force required to detach red-mature Hard Pick (HP) tabasco fruit was higher than that of redmature `McIlhenny Select' fruit in the field and greenhouse. The fruit detachment force of red field-grown HP fruit was higher, and in the greenhouse was lower, than that of green or breaker fruit. HP fruit of all maturity stages, except red-mature, separated similarly to `McIlhenny Select' fruit with little or no fruit tissue attached to the calyx. Fruit detachment force was not correlated with any fruit or pedicel characteristics studied.

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Isaac Zipori, Arnon Dag, Yizhar Tugendhaft, and Reuven Birger

fruit-detachment force (FDF), thereby increasing harvest efficiency ( Martin, 1994 ) and reduce the vibration intensity used in mechanical harvesting, thereby reducing the percentage of injured fruit and the severity of the defects ( Burns et al., 2008

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Kay P. Gersch, Carl E. Motsenbocker, and Gregory A. Lang

Cayenne pepper fruit adhere tightly to the calyx/receptacle, increasing the cost of hand harvest and restricting mechanical harvest. Eight (8) cayenne pepper genotypes were selected from field observations to characterize fruit detachment forces(FDFs) and examine potential relationships between FDF and other fruit parameters. A preliminary greenhouse experiment revealed two genotypes with consistently lower FDFs and two with consistently higher FDFs over several progressive harvest. A field experiment confirmed these characteristics. No correlation between any fruit parameter and FDF was found to be consistent over the genotypes studied.

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Joyous Suiyigheh Tata and Hans Christian Wien

in the opposite direction. The petal detachment force technique was adapted from a method described by Moebius-Clune et al. (2008) for intact soil core penetration resistance measurement in the laboratory. This device (1000 kg arbor press, SKU 3552

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Robert C. Ebel, Jacqueline K. Burns, Kelly T. Morgan, and Fritz Roka

speed, and fruit detachment force ( Whitney, 1997 ). There are two kinds of canopy shakers currently used in the commercial citrus industry in Florida. “Pull-behind” canopy shakers are pulled behind a tractor and drop fruit to the ground ( Whitney

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Raquel González-Herranz, Kimberley A. Cathline, Matthew W. Fidelibus, and Jacqueline K. Burns

fruit-bearing canes ≈1 week before harvest, which reduces fruit detachment force (FDF) and causes the rachis to become dry and brittle so that the cluster tends to break apart during harvest, allowing some berries to remain attached to their pedicels

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Matthew W. Fidelibus, Kimberley A. Cathline, and Jacqueline K. Burns

-air oven (60 °C) until they reached a constant weight. Clusters of grapes on vines from all the plots were carefully harvested and brought into a laboratory where fruit detachment force (FDF) measurements were made. Any grapes that detached from the vines