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RED-STRIPED FIREWORM CONTROL IN THE LABORATORY, 2004

RED-STRIPED FIREWORM CONTROL IN THE LABORATORY, 2004 (L6) BLUEBERRY: Vaccinium angustifolium Aiton ‘Lowbush’ J. A. Collins Dept. of Biological Sciences 5722 Deering Hall University of Maine Orono, ME 04469 Phone: (207) 581-2868 Fax: (207) 581-2969 E-mail: Judith.Collins@umit.maine.edu F. A. Drummond Dept. of Biological Sciences 5722 Deering Hall University of Maine Orono, ME 04469 Phone: (207) 581-2989 Fax: (207) 581-2969 E-mail: frank.drummond@umit.maine.edu Red-striped fireworm (RSFW): Aroga trialbamaculella Cham. Intrepid 2F, Mycotrol ES, and Aza-Direct were applied to blueberry foliage. Each treatment was applied in 25 gpa with a CO -pressurized, 80-inch boom sprayer (76-inch swath) equipped with four, flat-spray 8002VS TeeJet nozzles operating at 35 psi and at a slow walking speed. Speed was regulated using a metronome. The materials were allowed to dry on the foliage. For each of the three treatments + untreated checks, fifty stems with RSFW were placed in individual rearing cups. Treated stems were then cut, brought into the laboratory, and placed in each cup. The cups were held at room temperature and assessed for mortality at 2 – 3 day intervals for three weeks. Untreated blueberry foliage was added to each cup as needed. Any dead Mycotrol-treated larvae were held in the laboratory and observed for sporulation of Beauveria bassiana. The Product-Limit Survival Method and Wilcoxon Mean Separation (P < 0.05) were used to compare the mean time to death of each treatment to the untreated checks. Intrepid 2F and Mycotrol ES were both significantly different from the control. Intrepid 2F provided the best control. The application resulted in 98% mortality of larvae within 10 days of the application. Although mean time to death of Mycotrol ES was significantly different from the untreated check, it resulted in only 19% mortality by the end of the trial; 14.3% mortality was obtained with Aza-Direct. Rate amt Mean Average a b Treatment/formulation product/acre time to death Prob X 2 > 0.05 % mortality Intrepid 2F 16 fl oz 7.34 < 0.0001 9.8 Mycotrol ES 32 fl oz 18.28 0.0110 19.0 Aza-Direct 1.2% EC 32 fl oz 19.29 0.0665 14.3 Untreated check -- -- -- 0.0 Biased estimate due to censored observations (live larvae) at end of study. Pair-wise comparison with untreated check. Not possible to estimate because of 100% survival. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

RED-STRIPED FIREWORM CONTROL IN THE LABORATORY, 2004

Collins, J. A.; Drummond, F. A.
Arthropod Management Tests , Volume 30 (1) – Jan 1, 2005
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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.1093/amt/30.1.L6
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Abstract

(L6) BLUEBERRY: Vaccinium angustifolium Aiton ‘Lowbush’ J. A. Collins Dept. of Biological Sciences 5722 Deering Hall University of Maine Orono, ME 04469 Phone: (207) 581-2868 Fax: (207) 581-2969 E-mail: Judith.Collins@umit.maine.edu F. A. Drummond Dept. of Biological Sciences 5722 Deering Hall University of Maine Orono, ME 04469 Phone: (207) 581-2989 Fax: (207) 581-2969 E-mail: frank.drummond@umit.maine.edu Red-striped fireworm (RSFW): Aroga trialbamaculella Cham. Intrepid 2F, Mycotrol ES, and Aza-Direct were applied to blueberry foliage. Each treatment was applied in 25 gpa with a CO -pressurized, 80-inch boom sprayer (76-inch swath) equipped with four, flat-spray 8002VS TeeJet nozzles operating at 35 psi and at a slow walking speed. Speed was regulated using a metronome. The materials were allowed to dry on the foliage. For each of the three treatments + untreated checks, fifty stems with RSFW were placed in individual rearing cups. Treated stems were then cut, brought into the laboratory, and placed in each cup. The cups were held at room temperature and assessed for mortality at 2 – 3 day intervals for three weeks. Untreated blueberry foliage was added to each cup as needed. Any dead Mycotrol-treated larvae were held in the laboratory and observed for sporulation of Beauveria bassiana. The Product-Limit Survival Method and Wilcoxon Mean Separation (P < 0.05) were used to compare the mean time to death of each treatment to the untreated checks. Intrepid 2F and Mycotrol ES were both significantly different from the control. Intrepid 2F provided the best control. The application resulted in 98% mortality of larvae within 10 days of the application. Although mean time to death of Mycotrol ES was significantly different from the untreated check, it resulted in only 19% mortality by the end of the trial; 14.3% mortality was obtained with Aza-Direct. Rate amt Mean Average a b Treatment/formulation product/acre time to death Prob X 2 > 0.05 % mortality Intrepid 2F 16 fl oz 7.34 < 0.0001 9.8 Mycotrol ES 32 fl oz 18.28 0.0110 19.0 Aza-Direct 1.2% EC 32 fl oz 19.29 0.0665 14.3 Untreated check -- -- -- 0.0 Biased estimate due to censored observations (live larvae) at end of study. Pair-wise comparison with untreated check. Not possible to estimate because of 100% survival.

Journal

Arthropod Management Tests – Oxford University Press

Published: Jan 1, 2005

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