Multi-location field trials of Radiation-Modified Kappa Carrageenan as inducer of resistance against major pests and diseases in rice
2017
Magsino, G.L.
Efficacy of Radiation-Modified Kappa Carrageenan PGP as plant growth promoter and inducer of resistance against major pests and diseases in rice was evaluated under farmer fields in UPLB-CES [University of the Philippines Los Baños-Central Experiment Station] and Victoria, Laguna, Nueva Ecija, Bulacan, Iloilo and Zamboanga del Sur [Philippines]. Results have shown that supplementing farmer's practice on fertilizer application with 1.6li/ha, 3.0 li/ha and 4.8li/ha Carrageenan PGP sprayed three times per cropping season at 14, 30 and 45 DAT increased plant height, number of filled grains and grain yield while reducing number unproductive panicle length, number of filled grains and grain yield while reducing number of unproductive tillers and unfilled grains. Supplementing Carrageenan PGP, especially the 3.0 li/ha/application dosage, to farmer's practice produced 4.12% to34.78% greater yield during the Wet Season and 8.30% to 66% yield increase during Dry Season. Incidences of Tungro, bacterial leaf blight and other diseases were found to be less than 5% across all trial sites. Consistent high counts of beneficial arthropods such as spiders, ladybeetles, dragonflies and damselflies were observed in fields sprayed with Carrageenan PGP. The consistent presence of the natural enemies in the field were able to manage the population of pests including green leafhopper, brown planthopper and stemborers, The outstanding performance of Carrageenan PGP as plant growth promoter and inducer of resistance to insect pests and diseases was highlighted in the Farmer's Field Days conducted at each trial site. Farmers from different communities and organizations around the area were invited in the field days that serve as the initial step in the technology transfer. Research results of UPLB and Iloilo trials per Experimental Use Permit (EUP) Guidelines were submitted to FPA and provisional registration was issued last August 2017 and full product registration by the first quarter of 2018.
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