Implementing Reduced-Risk Integrated Pest Management in Fresh-Market Cabbage: Influence of Sampling Parameters, and Validation of Binomial Sequential Sampling Plans for the Cabbage Looper (Lepidoptera: Noctuidae)

Abstract

Populations of cabbage looper, Trichoplusiani (Lepidoptera: Noctuidae), were sampled in experimental plots and commercial fields of cabbage (Brasicca spp.) in Minnesota during 1998-1999 as part of a larger effort to implement an integrated pest management program. Using a resampling approach and the Wald's sequential probability ratio test, sampling plans with different sampling parameters were evaluated using independent presence/absence and enumerative data. Evaluations and comparisons of the different sampling plans were made based on the operating characteristic and average sample number functions generated for each plan and through the use of a decision probability matrix. Values for upper and lower decision boundaries, sequential error rates (alpha, beta), and tally threshold were modified to determine parameter influence on the operating characteristic and average sample number functions. The following parameters resulted in the most desirable operating characteristic and average sample number functions; action threshold of 0.1 proportion of plants infested, tally threshold of 1, alpha = beta = 0.1, upper boundary of 0.15, lower boundary of 0.05, and resampling with replacement. We found that sampling parameters can be modified and evaluated using resampling software to achieve desirable operating characteristic and average sample number functions. Moreover, management of T. ni by using binomial sequential sampling should provide a good balance between cost and reliability by minimizing sample size and maintaining a high level of correct decisions (>95%) to treat or not treat.

Cost-Effective Binomial Sequential Sampling of Western Bean Cutworm, Striacosta albicosta (Lepidoptera: Noctuidae), Egg Masses in Corn

“…The egg mass data represented a range of high, medium, and low egg densities, conducive for resampling analysis (Burkness and Hutchison 2009).…”

“…For each threshold at least two different upper and lower boundaries were tested that represented the proportion of plants infested with S. albicosta egg masses (Jones 1994). For the 4% threshold, three different ranges of variation were simulated (Burkness and Hutchison 2009). Two ranges of variation were similar and symmetric in lower and upper bounds (0.01Ð 0.07 and 0.02Ð 0.06).…”

“…Sequential sampling simulations were validated using independent Þeld data for each action threshold and a decision matrix was used as an extension of the validation process (Calvin et al 1986, Burkness et al 1999, Burkness and Hutchison 2009). Our decision matrix calculates the probability of making the correct decision (treat or no-treat).…”

Tabela de Esperança de Vida de Trichogramma pretiosum Riley em Ovos de Trichoplusia ni Hübner em Diferentes Condicionamentos Térmicos

“…Dentre os quais, destacam-se várias culturas de importância econômica como: brássicas, solanáceas, cucurbitáceas, algodão, soja, além de plantas daninhas (Janmaat & myers 2003;milanez et al 2009). Em algumas regiões dos Estados Unidos e Canadá, T. ni é considerada a principal praga das brássicas, acarretando sérios problemas para as culturas tanto em campo como em casas de vegetação, destacando-se frente outras pragas de grande importância como Plutella xylostella L. (Lepidoptera: Plutellidae) e Pieris rapae L. (Lepidoptera: Pieridae) (Burkness & HutcHison 2009). No Brasil esse inseto tem provocado enormes prejuízos especialmente entre as hortaliças folhosas, que podem ter sua comercialização inviabilizada devido aos orifícios causados pela alimentação das lagartas.…”

Estimativa Da Exportação De Nutrientes Pelos Frutos Do Maracujazeiro Doce Em Função Da Aplicação De Ureia E De Esterco Bovino

“…xylostella L. (Lepidoptera: Plutellidae) and Pieris rapae L. (Lepidoptera: Pyralidae) (ERLANDSON et al, 2007;BURKNESS;HUTCHISON, 2009). In Brazil this insect has provoked enormous losses especially among leafy vegetables, making them unmarketable due to depreciation incurred from holes made by feeding caterpillars (CARVALHO et al, 2012).…”