Crop, nutrient and pest management technologies [in PhilRice Midsayap]
2004
Estoy, G.F. Jr | Escabarte, R.S. Jr | Abordo, G.U. | Torrena, P.S. | Perialde, E.S. | Tadle, F.P.J. (Philippine Rice Research Inst., Bual Norte, Midsayap, North Cotabato (Philippines))
Laboratory techniques for the mass production of biological control agents for RBB [rice black bug] (Metarrhizium anisopliae and Telenomus sp.) were perfected, with pure cultures now being maintained. Seed production areas of the station and requesting farmers and LGUs [local government units] were supplied. Forty of 270 NCT entries were resistant to rice diseases and insect pests. Only 35 entries were WSB [white stem borer]-resistant, while eight promising donor lines against RBB were found. The most prevalent insect pests in F1 hybrid and AxR seed production sites in Cotabato and Davao del Sur were GLH, BPH, and WBPH [green leafhopper,brown planthopper and white-backed planthopper]. Forty-three on-farm sites in Cotabato, which employed the omission plot technique (Minus N, P and K), obtained an indigenous N supply (INS) of above 40 kg/ha. Average INS ranged from 50-77; IPS, 9-11; and IKS, 54-58 kg/ha. Recommended rate for next cropping was determined at 67, 22 and 77 kg N, P2O5, K2O/ha to achieve the target yield of 6 t/ha. MOET [minus one element technique] tests conducted on these sites showed nutrient deficiencies. Seeding rate for dapog F1 hybrid was best at 1000 g/sq m, sown with either rice hull ash or straw compost laid underneath a fine porous plastic net (mosquito net)
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