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EVALUATION OF ICON 6.2 FS, KARATE Z AND DIMILIN 2 L FOR RICE WATER WEEVIL CONTROL, 2001

EVALUATION OF ICON 6.2 FS, KARATE Z AND DIMILIN 2 L FOR RICE WATER WEEVIL CONTROL, 2001 (F85) RICE: Oryza sativa L., 'Cocodrie' EVALUATION OF ICON 6.2 FS, KARATE Z AND DIMILIN 2 L FOR RICE WATER WEEVIL CONTROL, 2001 M. O. Way, R. G. Wallace, M. S. Nunez, and G. N. McCauley Texas A&M University Agricultural Research & Extension Center 1509 Aggie Drive Beaumont, TX 77713 Phone: (409) 752-2741 Fax: (409) 752-5560 E-mail: moway@aesrg.tamu.edu Rice water weevil (RWW): Lissorhoptrus oryzophilus Kuschel The experiment was conducted at the Texas A&M University's Agricultural Research and Extension Center at Beaumont and was designed as a RCB with four replications. Plot size was 18 ft ´ 4 ft with each plot surrounded by a metal barrier to prevent interplot movement of insecticides and fertilizer. On 15 May, plots were drill-planted (seven rows and seven inches between rows) at 90 lb/acre. Some plots were planted with Icon 6.2 FS (at the rates in the table) using the "Le Sak" method in which a slurry of Icon 6.2 FS and water was evenly distributed over seed in a plastic bag. Once the slurry was applied, the contents of the bag were shaken and agitated for 10 min until maximum absorption and adsorption of the slurry occurred. After agitation, seed was allowed to air dry. On 18 May, plots were hand-fertilized with urea at 113.3 lb N/acre followed by incorporation with a rake. Immediately after incorporation, plots were flushed (temporary flood for 48 h). On 26 May, rice emerged through League soil. On 14 Jun, plots were sprayed with Arrosolo 3-3 E at 2 qt/acre, Basagran at 1.5 pt/acre, Facet 75 DF at 0.5 lb/acre and AgriDex at 1 pt/acre using a two-person spray rig (13 nozzles, tip size 80015, 50 mesh screens, 21.7 ft spray swath, 12.3 gpa final spray volume) pressurized with CO at 20-30 psi. On 15 Jun (20 d after rice emergence), plots were flooded. Foliar treatments were applied at the rates and times in the table with a hand-held spray rig (three nozzles, tip size 800067, 50 mesh screens, 4 ft spray swath, 28.8 gpa final spray volume) pressurized with CO at 20-30 psi. On 28 Jun, rice stand counts (three, 1 ft of row samples per plot) were taken. On 3 Jul, when rice was at panicle differentiation, plots were hand-fertilized with urea at 56.7 lb N/acre; thus, rice in plots received a total of 170 lb N/acre during the growing season. On 6 and 17 Jul (21 and 32 d after the flood, respectively), five, 4-inch diam ´ 4-inch deep mud cores (each core contained at least one rice plant) were removed from each plot. Rice plants in cores were washed and immature RWW recovered from the roots. On 13 Sep (110 d after rice emergence), plots were harvested with a small plot combine. Yields were adjusted to 12% 1/2 moisture. Immature RWW counts were transformed using (x + 0.5) and all data analyzed using ANOVA and DMRT. Rice plant stands were unaffected by the treatments. Icon 6.2 FS treatments provided the best control. The mid-rate Icon treatment gave 96% control on the first sample date. The Karate and Dimilin treatments gave less than 60% control on the first sample date. The mid-rate of Icon treatment outyielded the untreated 1,812 lb/acre. The Dimilin and Karate treatments outyielded the untreated 930 and 885 lb/acre, respectively. Lower than expected control by the Karate and Dimilin treatments may have been due to a very early infestation of adult RWW which resulted in a large proportion of eggs being laid before treatment application. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

EVALUATION OF ICON 6.2 FS, KARATE Z AND DIMILIN 2 L FOR RICE WATER WEEVIL CONTROL, 2001

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Oxford University Press
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© Published by Oxford University Press.
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2155-9856
DOI
10.1093/amt/27.1.F85
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Abstract

(F85) RICE: Oryza sativa L., 'Cocodrie' EVALUATION OF ICON 6.2 FS, KARATE Z AND DIMILIN 2 L FOR RICE WATER WEEVIL CONTROL, 2001 M. O. Way, R. G. Wallace, M. S. Nunez, and G. N. McCauley Texas A&M University Agricultural Research & Extension Center 1509 Aggie Drive Beaumont, TX 77713 Phone: (409) 752-2741 Fax: (409) 752-5560 E-mail: moway@aesrg.tamu.edu Rice water weevil (RWW): Lissorhoptrus oryzophilus Kuschel The experiment was conducted at the Texas A&M University's Agricultural Research and Extension Center at Beaumont and was designed as a RCB with four replications. Plot size was 18 ft ´ 4 ft with each plot surrounded by a metal barrier to prevent interplot movement of insecticides and fertilizer. On 15 May, plots were drill-planted (seven rows and seven inches between rows) at 90 lb/acre. Some plots were planted with Icon 6.2 FS (at the rates in the table) using the "Le Sak" method in which a slurry of Icon 6.2 FS and water was evenly distributed over seed in a plastic bag. Once the slurry was applied, the contents of the bag were shaken and agitated for 10 min until maximum absorption and adsorption of the slurry occurred. After agitation, seed was allowed to air dry. On 18 May, plots were hand-fertilized with urea at 113.3 lb N/acre followed by incorporation with a rake. Immediately after incorporation, plots were flushed (temporary flood for 48 h). On 26 May, rice emerged through League soil. On 14 Jun, plots were sprayed with Arrosolo 3-3 E at 2 qt/acre, Basagran at 1.5 pt/acre, Facet 75 DF at 0.5 lb/acre and AgriDex at 1 pt/acre using a two-person spray rig (13 nozzles, tip size 80015, 50 mesh screens, 21.7 ft spray swath, 12.3 gpa final spray volume) pressurized with CO at 20-30 psi. On 15 Jun (20 d after rice emergence), plots were flooded. Foliar treatments were applied at the rates and times in the table with a hand-held spray rig (three nozzles, tip size 800067, 50 mesh screens, 4 ft spray swath, 28.8 gpa final spray volume) pressurized with CO at 20-30 psi. On 28 Jun, rice stand counts (three, 1 ft of row samples per plot) were taken. On 3 Jul, when rice was at panicle differentiation, plots were hand-fertilized with urea at 56.7 lb N/acre; thus, rice in plots received a total of 170 lb N/acre during the growing season. On 6 and 17 Jul (21 and 32 d after the flood, respectively), five, 4-inch diam ´ 4-inch deep mud cores (each core contained at least one rice plant) were removed from each plot. Rice plants in cores were washed and immature RWW recovered from the roots. On 13 Sep (110 d after rice emergence), plots were harvested with a small plot combine. Yields were adjusted to 12% 1/2 moisture. Immature RWW counts were transformed using (x + 0.5) and all data analyzed using ANOVA and DMRT. Rice plant stands were unaffected by the treatments. Icon 6.2 FS treatments provided the best control. The mid-rate Icon treatment gave 96% control on the first sample date. The Karate and Dimilin treatments gave less than 60% control on the first sample date. The mid-rate of Icon treatment outyielded the untreated 1,812 lb/acre. The Dimilin and Karate treatments outyielded the untreated 930 and 885 lb/acre, respectively. Lower than expected control by the Karate and Dimilin treatments may have been due to a very early infestation of adult RWW which resulted in a large proportion of eggs being laid before treatment application.

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2002

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