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| Web URL(s): | https://www.plantmanagementnetwork.org/sub/trial/amt31/PDF/G/G12.pdf
Last checked: 11/11/2016
Requires: PDF Reader |
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| Publication Type:
| Report |
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| Author(s): | Thompson, Sarah R. |
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| Author Affiliation: | Department of Entomology, North Carolina State University, Raleigh, North Carolina |
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| Title: | Efficacy of single and multiple applications of Beauveria bassiana for control of mole cricket nymphs in turf, 2005 |
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| Source: | Arthropod Management Tests. Vol. 31, 2006, p. G12. |
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| Publishing Information: | Annapolis, MD: Entomological Society of America |
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| # of Pages: | 2 |
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| Keywords: | TIC Keywords: Application rates; Beauveria bassiana; Cynodon dactylon; Insect control; Gryllotalpidae; Scapteriscus vicinus; Scapteriscus borellii
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| Abstract/Contents: | "The efficacy of Beauveria bassiana spore applications for control of mole cricket nymphs in turf was investigated in a field trial. The objective of this test was to compare the efficacies of one high rate application to multiple low rate applications of B. bassiana. The checks included Talstar Flowable and an untreated check. Plots, 20 ^D#x 20 ft, were established on old fairway at Sea Trails Plantation in Brunswick Co., NC, an area with a history of mole cricket infestations and signs of damage present at the time of application. The test was set up as a RCB with four replicates of each treatment. The initial treatment applications were made on 6 Jul using a CO2-powered backpack sprayer calibrated to deliver 30 gpa. On this date, the high rate of B. bassiana, Talstar, and the first application of the repeated low rates of B. bassiana were made. The high rate of B. bassiana delivered 2 ^D#x 1013 spores/acre, while each of the four applications at the low rate delivered 5 ^D#x 1012 spores/acre, for a cumulative number of spores/acre equal to the high rate. The subsequent applications of the low rate of B. bassiana were made on 21 Jul, and 1 and 17 Aug. Talstar was applied at the label rate of 10 oz/1000 ft2. The golf course irrigation system provided approximately 0.5 inch of water to the test site immediately following all treatment applications. The air temperatures were 86°F on 6 Jul, 82°F on 21 Jul, 76°F on 1 Aug, and 85°F on 17 Aug. Soil at the test site was classified as Foreston fine sand with a pH of 3.9 and 0.86% humic matter. Soapy water flush sampling at the test site indicates that the fairway population was 93% tawny mole crickets and 7% southern mole crickets. Plots were evaluated for fresh mole cricket surface damage on 11, 17, 23, 31 Aug, and 7 Sep using the damage grid evaluation method of Cobb and Mack (1989). A one square meter grid divided into nine subsections was randomly placed in each plot and a damage rating was assigned based on the occurrence of surface damage in each of the nine subsections (with 0 = no damage and 9 = severe damage). Five ratings were made for each plot on each of the evaluation dates. The actual damage means for the five ratings are reported in the Table. All data were transformed √ (x + 0.5) prior to ANOVA and means separation by LSD t-test (P ≤ 0.05). Mole cricket infestation levels at this site appeared to be low prior to treatment applications, but this was most likely due to the inability of accurately rating the plots due to high mowing heights. There were no differences between any of the pre-treatment damage rating means. On 11 Aug, there were no significant differences between any of the treatments and the untreated check. There were also no differences between any of the treatments and the untreated check on 17 and 23 Aug; however, all treatments had numerically lower mean damage ratings compared to the untreated check. On 31 Aug, only Talstar treated plots showed significantly less damage than the control, but this treatment did not differ from the high rate or multiple applications of the low rate of B. bassiana. There were no differences between any of the treatments and the untreated check again on 7 Sep. Mole cricket nymphs are typically large and very active during the time of the year when this test was conducted, and earlier applications of any of these products may be more appropriate to achieve satisfactory levels of control. Additionally, the goal of the multiple applications of B. bassiana was to build up field levels of conidia, but treatments may need to be applied more frequently than every two weeks to accomplish this." |
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| Language: | English |
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| References: | 0 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Thompson, S. R. 2006. Efficacy of single and multiple applications of Beauveria bassiana for control of mole cricket nymphs in turf, 2005. Arthropod Manage. Tests. 31:p. G12. |
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| Web URL(s):
https://www.plantmanagementnetwork.org/sub/trial/amt31/PDF/G/G12.pdf
Last checked: 11/11/2016
Requires: PDF Reader |
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MSU catalog number: SB 951 .A1 I48 |
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