Corn, 1991

Harry C. Minor is an Associate Professor of Agronomy and State Extension Specialist, Carl G. Morris and Howard L. Mason are Senior Research Specialists, and Delbert R. Knerr, Alan W. Bixler, and C. Stephen Lankheit are Research Specialists in Agronomy.Compares hybrids and includes experimental procedures, yield results and seed corn company addresses.Comparing hybrids -- Experimental procedures -- Summary of results -- Yield results -- Seed corn company addresse

Rice, 1991

"January 1992.""The Authors: Harry C. Minor is an Associate Professor in Agronomy and State Extension Specialist: David W. Albers is an Assistant Professor in Agronomy and State Extension Specialist; Carl G. Morris and Howard L. Mason are Senior Research Specialists; and Delbert R. Knerr, Alan W. Bixler and C. Stephen Lankheit are Research Specialists.

The comparative efficiency of a brown algal-derived biostimulant extract (AMPEP), with and without supplemented PGRs: the induction of direct, axis shoots as applied to the propagation of vegetative seedlings for the successful mass cultivation of three commercial strains of Kappaphycus in Sabah, Malaysia

Three strains of Kappaphycus spp. (viz. K. alvarezii tambalang brown and green and K. striatus sacol green) were used in the present study to optimize the use of Ascophyllum (Acadian) marine plant extract powder (AMPEP) as a culture medium ingredient acting as a biostimulant, applied with, and without, the addition of terrestrial plant growth regulators (PGRs). This was undertaken in order to develop management tools and best practice recommendations for the mass production of new plantlets (seedlings) for industrial, nursery, and out-planting purposes in eastern Malaysia, Sabah, and Peninsular Malaysia (i.e., Langkawi, Kedah and Batu Maung, Penang). After 45 days of laboratory incubation, the three strains tested demonstrated their best performances at 3 mg L−1 of AMPEP, supplemented with PGR. This evaluation was based on the longest direct axes formed, the shortest time to their appearance, and also their highest percentage emergence. Kappaphycus alvarezii (tambalang green) had the longest direct axes (7.0 ± 0.23 mm), followed by K. alvarezii (tambalang brown) at (6.4 ± 0.48 mm) and finally K. striatus (sacol green). In terms of the highest percentage of direct axes formed, K. alvarezii (tambalang brown), K. alvarezii (tambalang green), and K. striatus (sacol green) were recorded as follows: 100 ± 0.00, 99 ± 1.34, and 98 ± 2.66, respectively. The shortest duration taken for the emergence of direct axes was observed in K. alvarezii (tambalang green) followed by tambalang brown and K. striatus (sacol green) on days 9, 10, and 15, respectively. The use of a brown seaweed-derived extract acting as a biostimulant and as the main ingredient of the culture medium for the micropropagation of three strains of Kappaphycus was highly encouraging and one which may be promoted as a protocol for the economic and commercial mass production of new plantlets (asexual seedlings) which are an urgent requirement for Malaysian seaweed farming to meet its full potential

Impacts of Ascophyllum marine plant extract powder (AMPEP) on the growth, incidence of the endophyte Neosiphonia apiculata and associated carrageenan quality of three commercial cultivars of Kappaphycus

Three commercial cultivars of Kappaphycus (e.g., K. alvarezii—Crocodile and Giant) and K. striatus (Sacol) were grown in Semporna, Sabah, for three consecutive growth cycles, each for a duration of 45 days. The study intended to determine the impacts of Ascophyllum marine plant extract powder (AMPEP) on the daily growth rates (DGR), percentage incidence of endophytic Neosiphonia apiculata, and the commercial, quality characteristics of extracted carrageenan from the harvested biomass (i.e., yield, viscosity, and gel strength). Results showed that the performances of AMPEP-treated thalli were significantly different (P < 0.01), in terms of the three major assessment criteria used in this study. Amongst the three cultivars and under the conditions tested, K. striatus was the most resistant to the incidence of N. apiculata, especially when treated with AMPEP. The use of AMPEP as a red seaweed biostimulant for the promotion of thallus growth rate, reduction of biotic stress caused by endophytes, and important improvements to commercially valuable traits, such as carrageenan quality, are encouraging and could be adopted in crop management protocols to assist the industry