A 3-yr study was conducted in 0.6- to 2.0-ha sugarcane fields throughout south Louisiana under varying sugarcane borer, Diatraea saccharalis (F.), density levels to determine the spatial dispersion of infestations and to develop a sequential sampling plan. Infestations of D. saccharalis were randomly dispersed. Infestation levels (percentage of stalks infested) ranged from 0.6 to 33.3%. Frequency distributions of the number of infested stalks indicated that the Poisson distribution best fit the data. Tests of other distributions (negative binomial [aggregated], binomial [uniform], geometric, and hypergeometric) resulted in poorer fits. The sequential sampling plan devised, with lower and upper D. saccharalis infestation limits of 2 and 5% and 5 and 10%, required maximum average sample numbers of 7.1 and 5.5 (20-stalk samples), respectively, to make terminating management decisions. It is our assessment that implementation of these plans would decrease sampling effort by 50–60% when compared with sampling programs currently in use for D. saccharalis management decisions in Louisiana.
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1 June 2001
Sampling for the Sugarcane Borer (Lepidoptera: Crambidae) on Sugarcane in Louisiana
H. P. Schexnayder,
T. E. Reagan,
D. R. Ring
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Journal of Economic Entomology
Vol. 94 • No. 3
June 2001
Vol. 94 • No. 3
June 2001
dispersion
sequential sampling
sugarcane
sugarcane borer