Sequential sampling plan for fruit fly species of the Genus Anastrepha (Diptera: Tephritidae) in guava orchards

Abstract

This study aimed to elaborate a sequential sampling plan for Anastrepha species in commercial orchards of guava Psidium guajava Novo Milênio cultivar. Samplings were carried out in three orchards in the State of Mato Grosso do Sul. Fruit flies were sampled for 23 weeks. Data were subjected to the sequential probability ratio test. We adopted the mean of 0.3 Anastrepha individuals for the safety level and 0.7 for the control level and the observed frequency was adjusted to the negative binomial expected frequency (Bn) for the equation of the line. The condition of adopting a control method recommended by S1 = 6.5554 + 0.5362n was observed in the upper line. In turn, the lower line, which does not require the use of a control method, is defined by So = -2.8229 + 0.5362n. The sequential sampling plan predicted the expected maximum number of 37 sampling units to decide whether or not to use control method(s). This sequential plan was defined with mean number of 0.54 adults for each McPhail trap unit (sample). The sequential plan generated is unprecedented and will contribute to the rapid and safe decision making in the control of Anastrepha species of economic importance in guava farming.

Does the surrounding vegetation influence the fruit fly assemblage in guava orchards?

“…Melo et al (2016) caught 66.45% of A. fraterculus in domestic orchards, emphasizing their generalist habit and preference for Myrtaceae. The dominance of this fly was recorded in orchards of P. guajava (NICÁCIO et al, 2018;ALVES et al, 2019) and Acca sellowiana (Berg) (ROSA et al, 2018). However, in periods without fruiting, the peak population of A. fraterculus is possibly due to the presence of host plants in the vicinity of the orchard (GARCIA et al, 2003b, LEMOS et al, 2015.…”

Sequential sampling plan for Ceratitis capitata (Diptera: Tephritidae) in guava orchards

“…The lower the initial number of limit the level of control, the greater will be the biotic potential of the target pest species. In guava orchards, it was found that C. capitata presents higher biotic potential that the co-occurring species of the genus Anastrepha (Nicácio et al 2018). The sequential sampling plan for the medfly population monitoring provided by the equations of lines, is intended to be used in a program of integrated pest management (IPM) as a tool for decision-making.…”

“…There is a worldwide shortage of studies of sampling plans to tefritids. However, recently, was created the first sequential sampling plan for the fruit flies of the genus Anastrepha for orchards of guava (Nicácio et al 2018) The objective of this work was to provide subsidies for the population monitoring of fruit flies in orchards, mainly of guava. The construction of a sequential sampling plan to flies of silkworms in commercial guava orchards.…”

Can ants contribute to the conservative biological control of the south american fruit fly?

“…Female fruit flies lay eggs on the fruits, and the larvae feed on the pulp. The quality of the fruits for fresh consumption and industrialization is compromised due to the damage caused by larvae (ALBERTI et al, 2009, NICÁCIO et al, 2018. The adequacy to the demands of the consumer market and the search for food safety, require rapid changes in the control techniques (DUARTE et al 2016, MARTINS et al, 2018.…”