Control biológico de chaetanaphothrips signipennis causante de la mancha roja en musa sp mediante el amblyseius swirskii

Abstract

The thrips Chaetanaphothrips signipennis is the causal agent of the red spot in the banana crop, damage that generates great economic losses to banana producers who depend on the economic income from the export of the fruit and therefore its control is of vital importance for the farmers, because the damage caused by this thrips affects the appearance of the fruit and traders and consumers would take it as an indicator of poor quality. Various forms of control are being implemented in banana plantations, but so far no effective control method, therefore, the research presents a way to control this insect by means of the predatory mite Amblyseius swirskii, an arthropod that has been proven highly effective at the moment. to reduce and control the population of thrips within other crops. In this framework, the general objective of the research was: to analyze the efficacy of Amblyseius swirskii through the biological control of Chaetanaphothrips signipennis in the axial area of the leaves of various banana plants. For this, a farm in the province of Santa Elena was selected, cultivated with the Cavendish clone, in this sector three lots (3, 4 and 16) were taken as the study area, within each lot a monitoring was carried out at the Randomly and in the form of a zigzag trying to cover the entire area, each lot was divided into three sections: "initial section", "middle section" and "final section", for each section twenty daughter plants were measured. study was that its height is within the range of 1.10m to 1.50m, giving a total of sixty plants per lot, these measurements were made with the help of a magnifying glass and through direct observation, in this way a design was formed pseudo-experimental without control or comparison groups. It was evidenced that the thrips population decreased exponentially in the course of the 13 weeks of study, with progressive increases in the mite population. In this way, the population of Chaetanaphothrips signipennis was prevented from exceeding economic damage levels. Within the study lots, a variation of data was presented with respect to the number of specimens found, but they were maintained in ranges, for mites between 200 to 207 specimens and for thrips within 30 to 200 individuals, in lot 3 it was evidenced the highest concentration of mites (272 specimens) and the least amount of thrips (31 specimens) was obtained, with this we can realize that the biological control is giving very favorable results for the culture, another relationship that we can mention is that in the batch 4, the highest number of thrips specimens was obtained with a population of 232 individuals, but in turn, the same lot has a favorable number of mites of 210 specimens, in such a way that there is evidently a favorable biological control in this lot, Since in the next week according to the trend obtained from the data studied so far, we can assure that said population of thrips will decrease while the population of mites will increase. a or will remain within the aforementioned ranges, in this way we demonstrate that Amblyseius swirskii used as a way of biological control for Chaetanaphothrips signipennis presents effective results and in a certain way is an environmentally friendly option.