Luzon Agricultural Research and Extension Center (LAREC)
1. Ten clones from the Preliminary yield test of Phil 2008 series recommended to undergo ecological test are: Phil 08-0909, Phil 08-1253, Phil 08-1123, Phil 08-1891, Phil 08-0553,Phil 08-1957,Phil 08-0747,Phil 08-0649, Phil 08-1307 and Phil 08-1231.
2. Phil 2007 series clones which showed resistant reaction to sugarcane smut were: five very highly resistant (Phil 07-0021, 07-0423, 07-0573,07-2319 and 07-0563), two highly resistant (Phil 07-0059, and 07-0355), five resistant (Phil 07-0025, 07-0099, 07-0241, 07-0415 and 07-0055) and seven intermediate resist- ant (Phil 07-0119, 07-0243, 07-0253, 07-0299,07-0279, 07-0411, and 07-2203).
3. Clones from Phil 2005-2006 series and Phil 02-0421 with showed resistant reaction to sugarcane downy mildew were: six very highly resistant (Phil 05-0315, 05-2057, 05-2191, 05-2335, 05-2585 and 02-0421), three highly resistant (Phil 06-0647, 05-1763, and 05-2527 and one resistant (Phil 05-1681).
4. In the 2005 Ecological Test, Phil 05-0055 and Phil 05-0483 which showed better performance against the check varieties and with very highly resistance reaction to smut and downy mildew are recommended for release.
1. There was no interaction between Variety (Phil 7544, 991793 and Phil 00-2569) and Age of harvest (11,12,13 and 14 months after planting) when planted in February 2012 (late planting) in organically (vermi-compost and chicken manure)-fertilized soil. Variety and age of harvest means for TC/Ha and Lkg/Ha were significantly different with Phil 99-1793 and 12 MAP age as highest while LKg/TC means were comparable.
2. In the test for ratoon performance of selected Phil 2004 series varieties, results showed that Phil 04-0081 had an ROI of 3.0 in the first ratoon and an ROI of 2.01 in the second ratoon at 76.84% survival rate. Phil 04-0081 is profitable to maintain up to the second ratoon.
La Granja Agricultural Research and Extension Center (LGAREC)
In the commercial hybrid production program, significant findings are as follows:
• The Phil 2012 Series Breeding Program produced 331 arrows from 256 bi-parental crosses using 85 female and 76 male selected parents.
• In the Single Seedling Pilot Test for Phil 2011 Series, 912 promising clones from 147 bi-parental crosses were selected as entries to the Row Test.
• In the Row Test for Phil 2010 series, 255 promising clones from 131 crosses were selected, propagated under Multiplication I and tested for smut. Two hundred four (204) clones were found resistant to the disease. One hundred ninety seven (197) clones were propagated under Multiplication II and tested for downy mildew.
• For Phil 2009 series, 199 clones out of 201 clones tested were found resistant to downy mildew and recommended for further multiplication and testing. The top 30 clones were considered entries to the Preliminary Yield Test, further propagated, verified for reaction to smut and simultaneously screened for leaf scorch and yellow spot diseases.
• For Phil 2008 series, smut test at PYT stage showed that 24 clones in the plant cane and 23 clones in the ratoon rated resistant to the disease; 10 clones were resistant to yellow spot and 28 clones were resistant to leaf scorch.
• The following selected clones from the Preliminary Yield Test for Phil 2008 Series were considered as entries to the Ecologic Test; Phil 08-06-0033, Phil 08-17-0161, Phil 08-55-0553, Phil 08-79-0747, Phil 08-88-0909, Phil 08-93-1009, Phil 08-105-1231, Phil 08 108-1307, Phil 08-108-1327 and Phil 08-109-1355.
• In the Ecologic Test Phil 2006 Series, Phil 2006-1899 gained over the two controls without incurring losses in tonnage and sugar yields. Phil 2006-2289 gave even scores for sucrose content. Phil 2006-1899 is high in tonnage, medium to high sucrose content and a sparse flowering variety. Phil 2006-2289 is medium to high in tonnage, high in sucrose content and a very sparse flowering variety. The two varieties are resistant to smut, downy mildew and leaf scorch, Phil 2006-1899 and Phil 2006-2289 are recommended for further evaluation by the Variety Committee.
• One thousand two hundred ninety seven (1,297) sugarcane accessions were planted in the Germplasm Collection as of October 2013. Eight (8) new accessions came from the Ecologic Test Phil 2006 project. Eight hundred twenty one (821) clones/varieties were partially characterized according to number of millable stalks, brix reading and stalk diameter.
In the production technology, significant findings are:
• Phil 2000-2569 and Phil 99-1793 ratoon applied with acetobacter gave higher average sugar yields ranging from 107.15 to 111.45 LKg/ha compared with the control with 100.59LKg/Ha.
Regardless of volumes and frequencies of acetobacter application , Phil 2000-2569 ratoon gave higher yield (130.7 LKg/Ha.) than Phil 99-1793 ratoon (92.5LKg/Ha.) obtained when applied 1 and 2 MAR and 1, 2 and 3 MAR respectively. The lowest sugar yield on both varieties was on the control without acetobacter. Phil 2000-2569 ratoon average mean sugar yield of 126.85 LKg/Ha. was significantly higher than Phil 99-1793 with 88.33 LKg/Ha., the sugar yield difference was 38.52 LKg/Ha.
Phil 99-1793 ratoon, mean sugar yield of acetobacter treated canes ranging from 110.15 to 119.35 LKg/Ha. was higher than the untreated (103.52 LKg/ha) however statistically comparable.
Similar with the plant cane, higher tonnage of Phil 2000-2569 ratoon compared with Phil 99-1793 was due to more number of millable stalks of the former variety.
• Phil 99-1793 ratoon applied with mudpress gave higher sugar yield than without mudpress with differences of 6.44 LKg/Ha. Ratoon sugar yield difference between acetobacter and untreated was 7.62 LKg/Ha.; 15.84 LKg/Ha.; 7.97 LKg/Ha.; 6.63 LKg/Ha. for strain 10069, strain 10071, strain 10078 and strain 10081 respectively.
Strain 10071 gave the highest mean tonnage of 53.17 TC/Ha. statistically comparable with strain 10078 (49.55 TC/Ha., strain 10069 (49.79TC/Ha. and strain 10081 (49.28 TC/Ha.) and the control (56.04TC/Ha.).
Mudpress in combination with the different strains gave significantly higher tonnage mean than without mudpress (50.976TC/Ha. against 48.28TC/Ha.). Highest average net benefit of Php 56,686.26 was obtained with acetobacter diazotrophicus (strain 10071) application. The net benefit difference over the control was Php 15,400.08. Highest net benefit of PhP 56,686.26 was obtained with Acetobacter diazotrophicus (strain 10071) application. The net benefit difference over the control was PhP 15,400.08.
• Phil 2000-2569 ratoon applied with mycorrhiza gave higher sugar yield (161.56 LKg/ha.) than without mycorrhiza (154.31LKg/Ha.) The difference was 7.25LKg/Ha. Among the different strains 10071 gave the higher sugar yield of 163.13 LKg/ha when combined with mycorrhiza. Similarly without mycorrhiza strain 10071 still gave the highest yield (159.37 LKg/Ha.).
Tonnage of Phil 2000-2569 ratoon applied with mycorrhiza was higher (81.65/Ha.) than without mycorrhiza (76.81TC/Ha.). The difference was 4.84TC/Ha. Strain 10071 consistently gave the highest mean tonnage yield of 79.77TC/Ha. Similar with plant cane, mycorrhiza plus the mixture of the four strains gave comparable yield with the single strain.
Improvement of sugar yield and tonnage yield of Phil 2000-2569 with the application of mycorrhiza and BNFs was due to improvement of the yield parameters such as stalk length, diameter and weight per stalk as well as the number of millable stalks.
Among the combinations of mycorrhiza and BNF strains, highest net benefit of Php 99,471.72 was obtained on strain 10071.
• Rock phosphate from different sources in Negros Occidental containing different total percentages of P2O5 applied to sugarcane ratoon as source of P fertilizer gave comparable results with either 18-46-0 or 16-20-0 in terms of TC/ha, LKg/TC and LKg/ha.
• Phil 99-1793 applied with either recommended rate of NPK of 1/2NP + full K + mycorrhiza gave significantly higher tonnage (119.68TC/ha) and mean sugar (267.99LKg/ha) than without mycorrhiza (112.11TC/ha) and 251.44 LKg/ha with a difference of 7.57 TC/ha and 16.55 LKg/ha On the other hand, BNFs combined with ½NP and full of K gave higher tonnage than canes with the same fertilizer treatments without BNF. Among the different BNFs strain 10076 gave the highest sugar yield with or without mycorrhiza.
Higher tonnage and sugar yield of Phil 99-1793 with the application of mycorrhiza and BNFs was due to improvement of the yield parameters such as length, diameter and weight per stalk as well as the number of millable stalks.
• Phil 99-1793, Phil 2000-0791, Phil 2000-2569, Phil 2001-0295 and Phil 2002-0359 first ratoon showed that tonnage, sugar rendement and sugar yield were significantly different. Phil 2000-0791 exhibited the highest cane tonnage (103.43TC/ha) and sugar yield (231.73 LKg/ha) than the other test varieties. Phil 2000-2569 ranked second in cane tonnage (98.16TC/ha) and sugar yield (214.44 LKg/ha) Phil 99-1793 (93.59TC/ha, 211.45LKg/ha), Phil 2002-0359 (83.49TC/ha, 193.87LKg/ha) while Phil 2001-0295 gave the lowest cane tonnage and sugar yield (66.48TC/ha, 136.04 LKg/ha).
Phil 2002-0359 significantly gave the highest sucrose content of 2.32 LKg/TC, comparable with Phil 2000-0791 (2.25LKg/TC), Phil 2000-2569 (2.18 LKg/TC) and Phil 99-1793 (2.26 LKg/TC and significantly higher than Phil 2001-0295 (2.06LKg/TC).
• Phil 99-1793 ratoon sugar yield was higher when NEB coated with urea was used instead of ordinary urea. Yield of NEB coated urea ranged from 263.75 to 302.75 LKg/ha while yield of ordinary urea range from 266.75 to 287.39 LKg/ha. Ordinary urea + mycoplex gave a sugar yield ranging from 275 LKg/ha to 293.70 LKg/ha.
Highest difference in sugar yield and tonnage was 25.23LKg/ha and 9.09TC/ha respectively in NEB coated urea (145 Kg N/ha) against ordinary urea (145 Kg N/ha).
Sugar yield improvement of 11.24 LKg /ha was obtained on urea (145 Kg N/ha) in combination with mycoplex compared with urea alone at the same rate.
Tonnage of Phil 99-1793 ratoon with NEB coated urea ranged from 109.25 to 122.92TC/ha, while ordinary urea gave 107.03 to 117.06 TC/ha. Urea in combination with mycoplex gave 111.83 to 118.48TC/ha.