Development of &lt;I&gt;Dermatophagoides pteronyssinus&lt;/I&gt; (Acari: Pyroglyphidae) at Constant and Simultaneously Fluctuating Temperature and Humidity Conditions

Pike, Adrian J.; Cunningham, M.J.; Lester, Philip J.

doi:10.1603/0022-2585(2005)042[0266:dodpap]2.0.co;2

Cited by 22 publications

(24 citation statements)

References 19 publications

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“…Thus, whereas we have recorded a relative humidity of 70% to kill all immature stages of T. putrescentiae, these authors reported that it was necessary to reduce the relative humidity to 60% to eliminate the immature stages of this mite. These differences could be due to different susceptibility to environmental conditions of various strains of the same species of mite, as it has been observed in house dust mites (Colloff 1987;Pike et al 2005), but also to the phenomena described by Cutcher (1973). Rivard (1958bRivard ( , 1959Rivard ( , 1961) employed a fungal diet in his experiments and pointed out that it was necessary to remove part of the fungal mycelium from the rearing cells when its growth was too plentiful.…”

Section: Discussionmentioning

confidence: 95%

“…Different authors have focused on the effect of relative humidity on development and life history parameters of several astigmatid mites including T. putrescentiae (Rivard 1958b(Rivard , 1959(Rivard , 1961Cunnington 1969Cunnington , 1976Cutcher 1973), A. siro L. (Cunnington 1976(Cunnington , 1985, Lepidoglyphus destructor (Schrank) (Danielsen et al 2004), Tirolichus casei Oudemans (Nangia and ChannaBasavanna 1989), Dermatophagoides farinae Hughes (Arlian et al 1998(Arlian et al , 1999a, D. pteronyssinus (Trouessart) (Colloff 1987;Arlian et al 1998;Pike et al 2005) or Euroglyphus maynei (Cooreman) (Arlian et al 1998). Nevertheless, there is no report to our knowledge about the effect of this physical agent on T. neiswanderi and A. farris.…”

Section: Introductionmentioning

confidence: 99%

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Effects of relative humidity on development, fecundity and survival of three storage mites

2007

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The developmental rate of immature stages and the reproduction of adults of Tyrophagus putrescentiae (Schrank), T. neiswanderi Johnston and Bruce and Acarus farris (Oudemans) were examined at 70, 80 and 90% r.h. and a constant temperature of 25 degrees C. At 70% r.h., T. putrescentiae and A. farris immature stages failed to reach the protonymph stage as 100% of the larvae died, whereas T. neiswanderi was able to complete development. The developmental time of all immature stages for the three species was significantly increased as relative humidity was reduced. The mobile stages were particularly susceptible, as the time needed to complete their development at lower relative humidities suffered greater increases than the egg stage. At 70% r.h., T. putrescentiae and A. farris were not able to lay eggs and only 24% of T. neiswanderi pairs were fertile. The reproductive parameters of the three species at the relative humidities at which they were able to lay eggs showed significant differences, except for the percentage of fertile mating at 80 and 90% r.h. As relative humidity increased, preoviposition period was reduced and fecundity and daily fecundity was increased, whereas the oviposition period showed different patterns for the three species. The intrinsic rate of increase (r ( m )) of T. neiswanderi at 70% r.h. was negative indicating that, at these conditions, mite populations of this species will diminish until they disappear. As relative humidity increased from 80 to 90% r.h. this parameter was almost twofold for both Tyrophagus species. The r ( m ) obtained for A. farris at 90% r.h. was similar to that of T. neiswanderi at the same humidity while at 80% r.h. it was very small so that the population doubling time was more than 84 days. The influence of relative humidity on biology of these mites and its practical application as control measure are discussed.

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Section: Discussionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Effects of relative humidity on development, fecundity and survival of three storage mites

2007

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“…De Boer et al (1997Boer et al ( , 1998 have demonstrated that mite populations can survive and prosper in average conditions that are well below even CEH min , provided that they are exposed to a few hours daily of favourable conditions. Similarly, Pike et al (2005) have shown that an HDM population exposed to sinusoidal conditions averaging 20.5˚C and 62.5% RH responded as if they were in steady state conditions of 23˚C and 75% RH. This suggests that the MPI model will tend to underpredict mite population growth.…”

Section: Discussionmentioning

confidence: 75%

A simple model for predicting the effect of hygrothermal conditions on populations of house dust mite Dermatophagoides pteronyssinus (Acari: Pyroglyphidae)

et al. 2006

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A simple Mite Population Index (MPI) model is presented which predicts the effect on house dust mite populations of any combination of temperature and relative humidity (RH). For each combination, the output is an index, or multiplication factor, such that 1.1 indicates 10% population growth and 0.9 indicates 10% population decline. To provide data for the model, laboratory experiments have been carried out using lab cultures of Dermatophagoides pteronyssinus. The population change was observed for mites held in steady-state conditions at different combinations of temperature and RH over 21 days. From the results, a best-fit equation has been derived which forms the basis of the MPI model. The results also enable a new term to be defined: the Population Equilibrium Humidity, PEH, the RH for a given temperature at which house dust mite populations neither grow nor decline. It is similar to Critical Equilibrium Humidity, the RH below which house dust mites are unable to maintain water balance, but relates to a population of mites (rather than a physiological phenomenon) and is more able to take account of the observed effects of extremes of temperature and RH. Compared with previous population models, the MPI model is potentially more accurate and comprehensive. It can be combined with other simple models (described in previous papers), such as BED, which simulates the average hygrothermal conditions in a bed, given room conditions, and Condensation Targeter II, which simulates room conditions given a range of easily obtainable inputs for climate, house type and occupant characteristics. In this way it is now possible, for any individual dwelling, to assess the most effective means of controlling mite populations by environmental means, such as by improving standards of ventilation and insulation, or by modifying the occupant behaviour that affects the hygrothermal environment within a dwelling. Although the MPI model requires further development and validation, it has already proved useful for understanding more clearly how the different hygrothermal conditions found in beds and bedrooms can affect mite populations. It has also demonstrated that there is considerable scope for controlling mites by environmental means in cold winter climates such as the UK.

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“…De Boer et al (1997Boer et al ( , 1998 and Pike et al (2005) have shown that DP populations held in unfavourable conditions of low RH, but given brief periods of favourable high RH conditions every day, are able to survive and even grow. Mite populations held continuously in harsh conditions decline and eventually die out.…”

Section: Simulation Using Changing Hygrothermal Conditionsmentioning

confidence: 99%

Predicting the population dynamics of the house dust mite Dermatophagoides pteronyssinus (Acari: Pyroglyphidae) in response to a constant hygrothermal environment using a model of the mite life cycle

et al. 2007

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A generalised model of the life cycle of a house dust mite, which can be tailored to any particular species of domestic mite, is presented. The model takes into account the effects of hygrothermal conditions on each life cycle phase. It is used in a computer simulation program, called POPMITE, which, by incorporating a population age structure, is able to predict population dynamics.The POPMITE simulation is adapted to the Dermatophagoides pteronyssinus (Acari: Pyroglyphidae) (DP) mite using published data on the egg development period, total development period, adult longevity, mortality during egg development, mortality during juvenile development, and fecundity of individual DP mites held at a range of constant hygrothermal conditions. An example is given which illustrates how the model functions under constant hygrothermal conditions.A preliminary validation of POPMITE is made by a comparison of the POPMITE predictions with published measurements of population growth of DP mites held at a range constant hygrothermal conditions for 21 days.The POPMITE simulation is used to provide predictions of population growth or decline for a wide range of constant relative humidity and temperature combinations for 30 and 60 days.The adaptation of the model to correctly take account of fluctuating hygrothermal conditions is discussed.

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Development of <I>Dermatophagoides pteronyssinus</I> (Acari: Pyroglyphidae) at Constant and Simultaneously Fluctuating Temperature and Humidity Conditions

Cited by 22 publications

References 19 publications

Effects of relative humidity on development, fecundity and survival of three storage mites

Effects of relative humidity on development, fecundity and survival of three storage mites

A simple model for predicting the effect of hygrothermal conditions on populations of house dust mite Dermatophagoides pteronyssinus (Acari: Pyroglyphidae)

Predicting the population dynamics of the house dust mite Dermatophagoides pteronyssinus (Acari: Pyroglyphidae) in response to a constant hygrothermal environment using a model of the mite life cycle

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