Reproduction, longevity and life table parameters of Tyrophagus neiswanderi (Acari: Acaridae) at constant temperatures

Abstract

The astigmatid mite Tyrophagus neiswanderi Johnston and Bruce is mainly considered a pest of ornamental and horticultural crops. However, this mite has been found infesting Cabrales cheese in Spain, though its population density is low compared to Acarus farris, the prevalent species of astigmatid mite encountered in Cabrales cheese maturing caves. One of the factors that might be influencing this differential abundance is temperature. In the present study the effect of temperature on reproductive parameters and longevity of T. neiswanderi was examined at six constant temperatures, ranging from 10 to 31 degrees C, and a relative humidity of 90 +/- 5%. Preoviposition period, fecundity and daily fecundity were adversely affected by extreme temperatures while the oviposition period increased as temperature was reduced. Male and female longevity increased as temperature decreased, but males showed significantly greater longevity than females. Additionally, this difference was greater as temperature decreased. The effect of temperature on the intrinsic rate of natural increase of T. neiswanderi populations was described by the non-linear Lactin model. The optimum temperature for development was predicted at 26.6 degrees C. At this temperature, the population doubling time is 2.8 days. The lower and upper thresholds for T. neiswanderi populations were calculated at 7.4 and 31.7 degrees C, respectively. According to these results, the influence of temperature on the low population density of this mite found in Cabrales maturing caves compared with A. farris is discussed.

Biological Aspects of Acarid Mite , Tyrophagus Neiswanderi Reared Under Laboratory Conditions on Two Food Types

“…Total average number of eggs 288.20 egg and with a daily rate 13.65 egg/day/female, and 175.35 egg with a daily rate 11.21 egg/day/female, when fed on yeast and lanshon (Table , 2). These results are in partial agreement with those conducted by Sanchez-Ramos et al (2007) who recorded that preoviposition period, fecundity and daily fecundity were adversely affected by extreme temperatures while the oviposition period increased as temperature. Male and female longevity increased as temperature decreased, but males showed significantly greater longevity than females.…”

Equine intradermal test threshold concentrations for house dust mite and storage mite allergens and identification of stable acari fauna

“…In addition to the aforementioned species, two other Tyrophagus mites, T. neiswanderi in the spring and T. sylvester in the winter, were also detected. Although little information is available on these two species, T. neiswanderi has been reported to have a similar optimal temperature to T. putrescentiae (7.39–31.7 ° C), and T. sylvester mites have been detected in the outdoor urban environment in Poland . For the time periods sampled in this study, the relative humidity was not ideal for the T. putrescentiae mites, but the average temperatures in spring and late summer were within the optimal range for both T. putrescentiae and T. neiswanderi .…”

“…Although little information is available on these two species, T. neiswanderi has been reported to have a similar optimal temperature to T. putrescentiae (7.39-31.7°C), and T. sylvester mites have been detected in the outdoor urban environment in Poland. 52,53 For the time periods sampled in this study, the relative humidity was not ideal for the T. putrescentiae mites, but the average temperatures in spring and late summer were within the optimal range for both T. putrescentiae and T. neiswanderi. The lower than preferred temperatures in the winter may explain the decrease in mite numbers of both species during this study period.…”

Overview of present and past and pest-associated risks in stored food and feed products: European perspective

“…There have been no recent reports of problems or outbreaks in the industrial area but new mite-related problems emerged in the products processed using traditional procedures. For example, the Cabrales cheeses in Spain are infested by Tyrophagus neiswanderi Johnston and Bruce 1965, and Acarus farris (Oudemans, 1905) (Sanchez-Ramos et al, 2007;Sanchez-Ramos and Castanera, 2009) and the Surk cheeses -traditional Turkish dairy products -are infested by T. putrescentiae (Ayguna et al, 2007). This reflects a general problem of the traditional style of food production that is hard to be in 100% compliance with the new hygienic standards in EU.…”