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SEED CORN MAGGOT CONTROL WITH IN-FURROW AND SOIL SURFACE BAND INSECTICIDE APPLICATIONS ON CANTALOUPES, 2012

SEED CORN MAGGOT CONTROL WITH IN-FURROW AND SOIL SURFACE BAND INSECTICIDE APPLICATIONS ON... Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E19 (E19) CANTALOUPE: Cucumis melo L.var. cantalupensis Naudin ‘Navigator’ SEED CORN MAGGOT CONTROL WITH IN-FURROW AND SOIL SURFACE BAND INSECTICIDE APPLICATIONS ON CANTALOUPES, 2012 John C. Palumbo University of Arizona, Yuma Agricultural Center th 6425 W. 8 St. Yuma, Arizona 85364 Phone: (928) 782-3836 Fax: (928) 782-1940 E-mail: jpalumbo@ag.arizona.edu Seedcorn maggot (SCM): Delia platura (Meigen) The objective of this trial was to evaluate the efficacy of several insecticides applied as in-furrow sprays compared to a soil surface band against seed corn maggots in spring melons. Three weeks before planting, a 0.5 acre block of cabbage was incorporated into the soil so that the decaying plant matter would attract SCM females to infest the test site. The field was planted with cantaloupe seed 'Gold Express’ at a precise density on 16 Mar, 2012. Seeds were hand planted at a seed spacing of 6 inches for a total 50 seeds per row. Plots consisted of one row 25-ft long and rows were spaced 84 inches apart (n=200 seeds / treatment). An attempt was made to ensure that depth of seeds was consistent at 0.5-0.75 inches. Plots were separated within rows by a 7-ft section of bare ground. The experimental design included insecticide treatments plus an untreated control arranged in a randomized complete block design replicated 4 times. All insecticides were applied as sprays either “in-furrow” at planting using a single-row-boom equipped with 1 flat fan nozzle (8004VS) and calibrated to deliver 8.5 gallons of spray per acre at 40 psi, or as a 8 inch “banded” spray applied directly over the seed line following planting. A combination of bone and meat meal was placed in a narrow band over the row (320 g per 25-ft row) to further attract SCM females immediately after seeds were planted and treatments applied. SCM control was assessed by making stand counts along the entire length of each row on 8 and 17 Apr (14 and 22 days after planting) to assess plant emergence and survival. Only emerged plants were counted and classified as either healthy (cotyledons green and fully expanded) or dead (cotyledons and stem brown and dried out). Data were analyzed as a 1-way ANOVA using a protected LSD F-test to distinguish treatment mean differences. Conditions were ideal for maggot pressure and the beds were irrigated twice prior to emergence. At seedling emergence (14 and 22 DAP), there were significant differences among the insecticides and application methods tested. At both evaluations, the Capture LFR and Athena plots applied in-furrow had significantly better emergence (>90%) compared to when they were applied as a surface band spray. Verimark applied in-furrow was not different from either of these pyrethroids treatments at 22 DAP, however the Verimark applied as a surface band treatment was not different from the untreated check. Surprisingly, seedling emergence in Radiant plots, regardless of which application was used, did not differ from the untreated check. Previous experiments have shown that Radiant can provide good activity when applied in-furrow. The results of this study should discourage growers from applying these products as a banded spray in attempt to control SCM in spring melons. However, the results are further evidence that in-furrow application of Capture LFR, Athena and Verimark are viable options for SCM control. No phytotoxicity was observed. This research was supported by a grant from the California Melon Research Board, PAL-13. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E19 Stand counts (% plants) 14 DAP 22 DAP Treatment Rate/ac Application Healthy Dead Healthy Dead Capture LFR 8.5 oz In-furrow 92.5a 0.5b 94.0a 0.5b Capture LFR 8.5 oz Banded 64.5bc 0.5b 61.5bcd 0.5b Radiant SC 5 oz In-furrow 48.5bcd 0.0b 58.0cde 0.0a Radiant SC 5 oz Banded 37.0d 0.5b 40.0e 1.5a Verimark 20SC 10 oz In-furrow 68.0b 1.0b 77.0ab 2.5a Verimark 20SC 10 oz Banded 54.5bcd 1.5ab 56.5cde 4.0a Athena SC 17 oz In-furrow 93.0a 0.5b 93.0a 1.5b Athena SC 17 oz Banded 64.0bc 3.0a 65.5bc 5.5a Untreated --- --- 45.5cd 0.5b 45.5de 6.0a F value 7.31 3.01 9.35 2.92 Pr > F >.0001 0.02 >.0001 0.03 Means in a column followed by the same letter are not significantly different (P > 0.05, F-protected LSD). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Arthropod Management Tests Oxford University Press

SEED CORN MAGGOT CONTROL WITH IN-FURROW AND SOIL SURFACE BAND INSECTICIDE APPLICATIONS ON CANTALOUPES, 2012

Arthropod Management Tests , Volume 38 (1) – Jan 1, 2013

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Publisher
Oxford University Press
Copyright
© Published by Oxford University Press.
eISSN
2155-9856
DOI
10.4182/amt.2013.E19
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Abstract

Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E19 (E19) CANTALOUPE: Cucumis melo L.var. cantalupensis Naudin ‘Navigator’ SEED CORN MAGGOT CONTROL WITH IN-FURROW AND SOIL SURFACE BAND INSECTICIDE APPLICATIONS ON CANTALOUPES, 2012 John C. Palumbo University of Arizona, Yuma Agricultural Center th 6425 W. 8 St. Yuma, Arizona 85364 Phone: (928) 782-3836 Fax: (928) 782-1940 E-mail: jpalumbo@ag.arizona.edu Seedcorn maggot (SCM): Delia platura (Meigen) The objective of this trial was to evaluate the efficacy of several insecticides applied as in-furrow sprays compared to a soil surface band against seed corn maggots in spring melons. Three weeks before planting, a 0.5 acre block of cabbage was incorporated into the soil so that the decaying plant matter would attract SCM females to infest the test site. The field was planted with cantaloupe seed 'Gold Express’ at a precise density on 16 Mar, 2012. Seeds were hand planted at a seed spacing of 6 inches for a total 50 seeds per row. Plots consisted of one row 25-ft long and rows were spaced 84 inches apart (n=200 seeds / treatment). An attempt was made to ensure that depth of seeds was consistent at 0.5-0.75 inches. Plots were separated within rows by a 7-ft section of bare ground. The experimental design included insecticide treatments plus an untreated control arranged in a randomized complete block design replicated 4 times. All insecticides were applied as sprays either “in-furrow” at planting using a single-row-boom equipped with 1 flat fan nozzle (8004VS) and calibrated to deliver 8.5 gallons of spray per acre at 40 psi, or as a 8 inch “banded” spray applied directly over the seed line following planting. A combination of bone and meat meal was placed in a narrow band over the row (320 g per 25-ft row) to further attract SCM females immediately after seeds were planted and treatments applied. SCM control was assessed by making stand counts along the entire length of each row on 8 and 17 Apr (14 and 22 days after planting) to assess plant emergence and survival. Only emerged plants were counted and classified as either healthy (cotyledons green and fully expanded) or dead (cotyledons and stem brown and dried out). Data were analyzed as a 1-way ANOVA using a protected LSD F-test to distinguish treatment mean differences. Conditions were ideal for maggot pressure and the beds were irrigated twice prior to emergence. At seedling emergence (14 and 22 DAP), there were significant differences among the insecticides and application methods tested. At both evaluations, the Capture LFR and Athena plots applied in-furrow had significantly better emergence (>90%) compared to when they were applied as a surface band spray. Verimark applied in-furrow was not different from either of these pyrethroids treatments at 22 DAP, however the Verimark applied as a surface band treatment was not different from the untreated check. Surprisingly, seedling emergence in Radiant plots, regardless of which application was used, did not differ from the untreated check. Previous experiments have shown that Radiant can provide good activity when applied in-furrow. The results of this study should discourage growers from applying these products as a banded spray in attempt to control SCM in spring melons. However, the results are further evidence that in-furrow application of Capture LFR, Athena and Verimark are viable options for SCM control. No phytotoxicity was observed. This research was supported by a grant from the California Melon Research Board, PAL-13. 1 Arthropod Management Tests 2013, Vol. 38 doi: 10.4182/amt.2013.E19 Stand counts (% plants) 14 DAP 22 DAP Treatment Rate/ac Application Healthy Dead Healthy Dead Capture LFR 8.5 oz In-furrow 92.5a 0.5b 94.0a 0.5b Capture LFR 8.5 oz Banded 64.5bc 0.5b 61.5bcd 0.5b Radiant SC 5 oz In-furrow 48.5bcd 0.0b 58.0cde 0.0a Radiant SC 5 oz Banded 37.0d 0.5b 40.0e 1.5a Verimark 20SC 10 oz In-furrow 68.0b 1.0b 77.0ab 2.5a Verimark 20SC 10 oz Banded 54.5bcd 1.5ab 56.5cde 4.0a Athena SC 17 oz In-furrow 93.0a 0.5b 93.0a 1.5b Athena SC 17 oz Banded 64.0bc 3.0a 65.5bc 5.5a Untreated --- --- 45.5cd 0.5b 45.5de 6.0a F value 7.31 3.01 9.35 2.92 Pr > F >.0001 0.02 >.0001 0.03 Means in a column followed by the same letter are not significantly different (P > 0.05, F-protected LSD).

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Arthropod Management TestsOxford University Press

Published: Jan 1, 2013

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