Recommended yellow corn hybrids under Claveria [Misamis Oriental, Philippines]
2010
Anon.
All corn hybrids were resistant to bacterial stalk rot for both wet and dry season. For earworm incidence, all other hybrids turned out to be resistant except MM888 which was highly susceptible. All hybrids were affected with Fusarium ear rot for the first cropping while in the 2nd cropping, some hybrids like NM08A2, NM08A5 and DK818 RRC2 turned to be resistant. During the dry season, statistical analysis showed highly significant difference between treatment means, NM08A4 variety exhibited highest plant height of 257.5 cm and TCT 1353 variety exhibited lowest plant height (214.5 cm). Different yellow corn hybrids significantly differ in height due to its genetic material and environmental condition. Highly significant difference between treatment means for the two cropping seasons. BC 62569 gave the highest average height of 148.25 cm and USMARC 8101g as the lowest with average ear height of 107 cm for the wet season. During the 2nd cropping, still BC 62569 variety showed had the highest ear height of 140.5 cm and TCT 1353 has the lowest at 90.75 cm. Based on DMRT result, the means differ significantly with each other with NM08A3 showing the biggest ear length of 20.94 cm and NM08A2 as the smallest of 17.21 cm for the wet season and NM08A5 with 20.65 cm and BC 62569 with 14.7 cm as the biggest and smallest ear length, respectively for the dry season cropping. The earliest number of days in which corn plants developed silk was 60 days after seed emergence and 66 days as the latest and was obtained by MM888 and TCT 1353, respectively for the 1st cropping. In the second cropping, MM888 and DAS 20059 were the first and the last to develop silk, respectively. Number of ears per plot for each hybrid differ with each other with DAS 20064 having the most number of ears (54) and NM08A4 with the least number of ears of 36 for the 1st cropping period. In the 2nd cropping, DK 818 gave the most number of ears of 57, BC62569, and MM888 having the least number of ears per plot of 34. During the wet season (1st cropping), corn plants suffered from stalk lodge but not as severe during the 2nd cropping. In the 1st cropping, the most number of lodged plants was five and exhibited by hybrids NM08A2, MM8255, NM08A5 and NM08A1 and the least was one obtained by BC62569. In the second cropping (dry season), DAS 20059 was observed to have the most number of lodge plants of 29 and NM08A2 hybrids showed to be resistant from lodging. Statistical analysis showed significant differences among treatment means. Stand count is the number of plants per plot with or without ears. In the first cropping, stand count ranges from 37 to 49 with DAS 20064 and DAS 20059 having the most number of plants per plot (49) and NM08A4 having the least number (37). In the second cropping, all hybrids (stand count 45-50) except MM888 and DAS 20059 (35 and 34 stand count) were not significantly different with each other. The yield and yield components also showed slightly to highly significant difference among the corn hybrids giving NM08A5 as the high yielding hybrid with 7.46 t/ha during the first cropping and NM08A4 in the second cropping as the high yielding hybrid with 9.34 t/ha. In the 1st cropping, NM08A5 gave the highest net income of Php. 70,472.00 with return in investment of 2.52 per peso invested and MM888 gave the lowest net income of Php. 29,420.00 with ROI of 1.05/peso. In the second cropping, NM08A4 obtained the highest net income of Php. 95,090 with ROI of 3.07% while MM888 had losing production of -0.09% computed ROI. The two hybrids, NM08A4 and NM08A5 are recommended for cultivation under Claveria condition since it gave higher yield and higher net income compared to other hybrids evaluated.
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