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| Web URL(s): | https://academic.oup.com/jee/article/76/4/792/2213913/Correlation-of-Absolute-Population-Estimates-of
Last checked: 02/17/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
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| Publication Type:
| Refereed |
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| Author(s): | Alvarado, E. A.;
Wilson, B. H.;
Fuxa, J. R. |
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| Author Affiliation: | Department of Entomology, Louisiana Agricultural Experiment Station, Louisiana State University Agricultural Center, Baton Rouge, LA |
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| Title: | Correlation of absolute population estimated of Spodoptera frugiperda (Lepidoptera: Noctuidae) with sweep sampling and yield in bermudagrass |
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| Source: | Journal of Economic Entomology. Vol. 76, No. 4, 1983, p. 792-796. |
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| Publishing Information: | Concord, N. H.: Entomological Society of America |
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| Keywords: | TIC Keywords: Spodoptera frugiperda; Cynodon dactylon
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| Geographic Terms: | Louisiana |
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| Abstract/Contents: | Studies were carried out in Louisiana in 1980-81 to correlate absolute populaiton estimates of Spodoptera frugiperda (J.E. Smith) with sweep sampling and yield in Bermudagrass (Cynodon dactylon ). Regression analysis of larvae per m2 (x) against larvae per net sweep (y) resulted in equations of y = 0.03x + 0.40 (r2 = 0.86) and y = 0.08x - 0.10 (r2 = 0.68) in Bermudagrass 2-15 and more than 15 cm high, respectively. Significantly more larvae were captured by sweep-net from 14.00 to 15.00 h than from 10.00 to 11.00 or 18.30 to 19.30 h. Regression analysis of larvae per square metre against alicia Bermudagrass yield in field-cage tests indicated that 6th-instar larvae reduced yield by 436 mg per larva and 3rd- to 6th-instar larvae by 828 mg per larva. Under 1982 market conditions, the economic injury level for S. frugiperda on alicia Bermudagrass in the state was 0.67 3rd- to 6th-instar larvae per sweep in grass 2-15 cm high sampled at 14.00 to 15.00 h. |
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| Language: | English |
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| References: | Unknown |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Alvarado, E. A., B. H. Wilson, and J. R. Fuxa. 1983. Correlation of absolute population estimated of Spodoptera frugiperda (Lepidoptera: Noctuidae) with sweep sampling and yield in bermudagrass. J. Econ. Entomol. 76(4):p. 792-796. |
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| Web URL(s):
https://academic.oup.com/jee/article/76/4/792/2213913/Correlation-of-Absolute-Population-Estimates-of
Last checked: 02/17/2017
Access conditions: Item is within a limited-access website
Notes: Guide page |
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MSU catalog number: SB 931 .A1 J6 |
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