Search Results

You are looking at 1 - 10 of 15 items for

  • Author or Editor: P.W. Wilson x
Clear All Modify Search

Abstract

Fruit of Tabasco pepper (Capsicum frutescens L.) were graded into six color classes, ranging from green to red, as determined by the Munsell System of Color Notation. Color of either whole or mashed Tabasco fruit was measured by use of a Gardner Color Difference Meter, and by the approved method of the Assn. of Official Analytical Chemists (AOAC). Different procedures using the color difference meter were initially analyzed and procedure se analyzed statistically for differences. Analysis of pepper fruit mash using the L-Scale aL/bL value and three optical sample beaker rotations resulted in the smallest se of tested procedures. One hundred percent and 64.8% of fruit color values recorded from the Gardner Color Difference Meter and the AOAC method, respectively, were correctly color-classified by discriminant analysis.

Open Access

Priming or presoaking seed of common carpetgrass (Axonopus affinis Chase) and centipedegrass [Eremochloa ophiuroides Munro. (Kunz)] increased germination percentage and decreased mean time of germination (MTG) at 20, 25, and 30 °C. The effect of presoaking and priming was dependent on grass species and temperature. The optimum seed germination temperature for both of these warm-season species was 30 °C. Maximum effect on common carpetgrass or centipedegrass seeds was achieved by priming in 2% KNO3; higher concentrations did not improve germination percentage or MTG, and 4% was in some cases detrimental. Germination was higher and MTG lower at 20 and 30 °C than at 15 °C. Presoaking common carpetgrass and centipedegrass seeds was the most efficient seed enhancement treatment for germination at 30 °C.

Free access

Temperature is most often used to control the progress of a poinsettia (Euphorbia pulcherrima Willd.) crop after flower initiation, but lack of good temperature control can make crop timing difficult. Degree-day summations are used to monitor and predict developmental stages of many crops. The objective was to determine whether degree-days can be used to predict poinsettia crop development. Dates of occurrence of first bract color and anthesis were observed for `Gutbier V-14 Glory' and `Annette Hegg Dark Red' poinsettia plants for 3 years. Total degree-day accumulation was read from an electronic instrument each day dates were recorded. There was a high level of consistency in the degree-day values, suggesting that degree-day accumulations offer a means of monitoring crop progress and of calculating temperature regimes so that plants finish on time.

Free access

Abstract

‘Beauregard’ sweet potato [Ipomoea batatas [L.] Lam.] was developed by the Louisiana Agricultural Experiment Station to combine resistance to diseases and insects of local importance with good horticultural and culinary characteristics. This cultivar, first designated L82-508, is named after Louisiana's renowned civil engineer and “Napo-lean in Grey,” Gen. P.G.T. Beauregard.

Open Access

Abstract

‘La Festival’ peach [Prunus persica (L.) Batsch] was released to provide a yellow flesh cultivar with a good quality fruit requiring 400 to 500 hr chilling. ‘La Festival’ produces a heavy crop of medium to large freestone fruit that ripen about 25 June, or about 20 days before ‘Elberta’ in southern Louisinna

Open Access