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NAVEL ORANGEWORM CONTROL IN PISTACHIO, 2004

NAVEL ORANGEWORM CONTROL IN PISTACHIO, 2004 (D7) PISTACHIO: Pistacia vera L. Brent A. Holtz and Tome Martin-Duvall University of California Cooperative Extension, Madera Co. 328 Madera Avenue Madera, CA 93637 Phone: (559) 675-7879 Ext. 205 Fax: (559) 675-0639 E-mail: baholtz@ucdavis.edu David R. Haviland University of California Cooperative Extension, Kern Co. 1031 S. Mount Vernon Ave Bakersfield, CA 93307 Phone: (661) 868-6215 Fax: (661) 868-6208 E-mail: dhaviland@ucdavis.edu Navel Orangeworm: Amyelois transitella (Walker) A trial was conducted in 2004 in Madera, Madera Co., CA to evaluate the effects of insecticides on navel orangeworm in pistachios. A total of 75 trees were organized into a RCBD with 5 single tree replications of 14 treatments and an untreated check. Treatments were made using a handgun that delivered four gallons per tree (540 gpa) through a 90 disk nozzle at 200 psi on 2 Jul and 4 Aug to correspond with the second and third flights of navel orangeworm. The 4 Aug application also corresponded to the initiation of hull split. Plots were sampled on 10 Sep by collecting approximately 1000 nuts from each individual tree. Samples were placed in the freezer for storage purposes and then processed at time permitted during the winter by cracking 200 individual nuts per tree and evaluating for the presence or absence of navel orangeworm damage. Data of the percentage of infested nuts were analyzed by with means separated by Fisher’s Protected LSD (P = 0.05). Table 1 shows the effects of insecticide treatments on the percentage nut meats infested with navel orangeworm. All products reduced the percentage infested nuts except for BAS 320 compared to the untreated plot. Intrepid, DPX-E2Y45 (2 oz), Avaunt (5 oz and 6 oz), Danitol, and Assail maintained percentage of nut meats infested with navel orangeworm below the industry standard goal of 2.0%, compared to 6.1% for the untreated check. Table 1. Surfactant Percentage Treatment/ Rate-form rate/acre or infested nuts formulation Surfactant prod/acre v/v at harvest Intrepid 2F Latron-B1956 16 fl oz 0.125% 0.8a DPX-E2Y45 35WG 2 oz 1.4ab Avuant 30WDG Latron-B1956 6.0 oz 16.0 fl oz 1.4ab DPX-E2Y45 35WG 3 oz 1.5ab Avuant 30WDG Latron-B1956 5.0 oz 16.0 fl oz 1.6ab Danitol 2.4 EC Latron-B1956 16.0 fl oz 16.0 fl oz 1.7ab Assail TD-2480 30WDG Latron-B1956 6.0 oz 16.0 fl oz 1.8ab Perm-Up 3.2EC 12.0 fl oz 2.0ab Imidan 70W Latron-B1956 4.33 lb 16.0 fl oz 2.5abc Assail TD-2480 30WDG Latron-B1956 8.0 oz 16.0 fl oz 2.6abc DPX-E2Y45 35WG 1 oz 3.4bc Lorsban 4E Latron-B1956 64.0 fl oz 16.0 fl oz 3.4bc Success 2SC Latron-B1956 6.0 oz 16.0 fl oz 3.5bc BAS 320 240SC Penetrator Plus 0.25 lb ai 0.5% 4.4cd Untreated 6.1d Means in a column followed by the same letter are not significantly different ( P= 0.05, Fisher’s protected LSD) http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

NAVEL ORANGEWORM CONTROL IN PISTACHIO, 2004

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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/33.1.D7
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Abstract

(D7) PISTACHIO: Pistacia vera L. Brent A. Holtz and Tome Martin-Duvall University of California Cooperative Extension, Madera Co. 328 Madera Avenue Madera, CA 93637 Phone: (559) 675-7879 Ext. 205 Fax: (559) 675-0639 E-mail: baholtz@ucdavis.edu David R. Haviland University of California Cooperative Extension, Kern Co. 1031 S. Mount Vernon Ave Bakersfield, CA 93307 Phone: (661) 868-6215 Fax: (661) 868-6208 E-mail: dhaviland@ucdavis.edu Navel Orangeworm: Amyelois transitella (Walker) A trial was conducted in 2004 in Madera, Madera Co., CA to evaluate the effects of insecticides on navel orangeworm in pistachios. A total of 75 trees were organized into a RCBD with 5 single tree replications of 14 treatments and an untreated check. Treatments were made using a handgun that delivered four gallons per tree (540 gpa) through a 90 disk nozzle at 200 psi on 2 Jul and 4 Aug to correspond with the second and third flights of navel orangeworm. The 4 Aug application also corresponded to the initiation of hull split. Plots were sampled on 10 Sep by collecting approximately 1000 nuts from each individual tree. Samples were placed in the freezer for storage purposes and then processed at time permitted during the winter by cracking 200 individual nuts per tree and evaluating for the presence or absence of navel orangeworm damage. Data of the percentage of infested nuts were analyzed by with means separated by Fisher’s Protected LSD (P = 0.05). Table 1 shows the effects of insecticide treatments on the percentage nut meats infested with navel orangeworm. All products reduced the percentage infested nuts except for BAS 320 compared to the untreated plot. Intrepid, DPX-E2Y45 (2 oz), Avaunt (5 oz and 6 oz), Danitol, and Assail maintained percentage of nut meats infested with navel orangeworm below the industry standard goal of 2.0%, compared to 6.1% for the untreated check. Table 1. Surfactant Percentage Treatment/ Rate-form rate/acre or infested nuts formulation Surfactant prod/acre v/v at harvest Intrepid 2F Latron-B1956 16 fl oz 0.125% 0.8a DPX-E2Y45 35WG 2 oz 1.4ab Avuant 30WDG Latron-B1956 6.0 oz 16.0 fl oz 1.4ab DPX-E2Y45 35WG 3 oz 1.5ab Avuant 30WDG Latron-B1956 5.0 oz 16.0 fl oz 1.6ab Danitol 2.4 EC Latron-B1956 16.0 fl oz 16.0 fl oz 1.7ab Assail TD-2480 30WDG Latron-B1956 6.0 oz 16.0 fl oz 1.8ab Perm-Up 3.2EC 12.0 fl oz 2.0ab Imidan 70W Latron-B1956 4.33 lb 16.0 fl oz 2.5abc Assail TD-2480 30WDG Latron-B1956 8.0 oz 16.0 fl oz 2.6abc DPX-E2Y45 35WG 1 oz 3.4bc Lorsban 4E Latron-B1956 64.0 fl oz 16.0 fl oz 3.4bc Success 2SC Latron-B1956 6.0 oz 16.0 fl oz 3.5bc BAS 320 240SC Penetrator Plus 0.25 lb ai 0.5% 4.4cd Untreated 6.1d Means in a column followed by the same letter are not significantly different ( P= 0.05, Fisher’s protected LSD)

Journal

Arthropod Management TestsOxford University Press

Published: Jan 1, 2008

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