Soil microflora as hosts of redlegged earth mite (Halotydeus destructor)

Maclennan, K. E.; McDonald, G.; Ward, S. A.

doi:10.1046/j.1570-7458.1998.00295.x

Cited by 15 publications

(8 citation statements)

References 9 publications

(19 reference statements)

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“…Plots with higher densities of P. major therefore had lower reproductive outputs over the diapause generation. This may reßect intraspeciÞc competition at the juvenile stage, which feeds on nonplant material (Maclennan et al 1998).…”

Section: Resultsmentioning

confidence: 99%

“…However, in the generation following diapause, density-dependent effects were found for P. major but not for H. destructor. Density-dependent effects will not occur when eggs are in the diapause stage but juveniles may compete for food once diapause breaks, particularly because the juveniles are dependent on soil microßora (Maclennan et al 1998). The density effects for P. major explain the signiÞ-cantly higher reproductive output for P. major in the mixed plots compared with the pure plots where densities were relatively higher.…”

Section: Discussionmentioning

confidence: 99%

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Competitive Interactions Between Two Pest Species of Earth Mites, Halotydeus destructor and Penthaleus major (Acarina: Penthaleidae)

Weeks

Hoffmann

2000

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Competition was investigated between two pest earth mite species, Penthaleus major Dugés and Halotydeus destructor Tucker, which occur sympatrically and are major pests of southern Australian pastures and crops. Three geographically separate pasture sites within Victoria were sampled monthly. Abundance patterns were similar across sites in that there was a marked increase in number of H. destructor in spring. Field competition plots were set up on pasture. In the first season, H. destructor had a negative effect on P. major but not vice versa. During the summer, diapause and ensuing generation, density-dependent (intraspecific) competition was evident in P. major but not in H. destructor. The interspecific asymmetry was switched in the following season, with P. major dominating most plots and having a negative effect on the reproductive output of H. destructor. These findings indicate that suppression or eradication of one species of earth mite from pastures may result in another species increasing in relative abundance.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Competitive Interactions Between Two Pest Species of Earth Mites, Halotydeus destructor and Penthaleus major (Acarina: Penthaleidae)

Weeks

Hoffmann

2000

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“…One potential reason is that this species requires another food source for development like microflora on the soil surface. MacLennan et al (1998) showed that H. destructor was able to survive, grow, develop and reproduce on an unsuitable host when microflora was present on the soil surface. They suggested that the major effect of the microflora was to increase the survivorship of mites during the early developmental stages, providing both food and a favorable microclimate for the larvae.…”

Section: Discussionmentioning

confidence: 99%

Survival and reproduction of the pest mites Balaustium medicagoense and Bryobia spp. on winter grain crops

et al. 2010

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Balaustium medicagoense and Bryobia spp. have recently been identified as emerging pests of winter crops and pastures in Australia. These mites have a high natural tolerance to currently registered pesticides, highlighting the need to develop alternative control strategies such as cultural controls which require an understanding of plant associations. In shade-house experiments, Bryobia spp. survived and reproduced successfully on pasture, lupins and oats, but progeny failed to reach the adult stage on canola and wheat. Balaustium medicagoense progeny failed to produce a generation on any crop but parental adults survived a few months on all crops, particularly wheat. Bryobia spp. damaged canola, pasture and lupins, but caused minimal damage to oats and wheat, whereas Ba. medicagoense caused considerable damage to wheat and lupins, but only moderate damage to canola, oats and pasture. Field survey data, taken from approximately 450 sites across southern Australia, combined with analysis of historical pest reports, suggest broadleaf crops such as canola, lucerne, lupins and weeds appear particularly susceptible to attack by Bryobia species. Balaustium medicagoense was more commonly found on cereals and grasses, although they also attacked broadleaf crops, particularly canola, lucerne and lupins. These findings show that the mites have the potential to be an important pest on several winter grain crops and pasture, but there are important differences that can assist in management strategies such as targeted crop rotations.

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“…are also likely to feed on lower plants and microflora found on the soil surface . Maclennan et al (1998) suggested the presence of microflora may permit populations to survive, develop and reproduce when higher plants are unavailable or are unsuitable as hosts. The Penthaleus spp.…”

Section: Feeding and Behaviourmentioning

confidence: 99%

“…Weeds and/or other nonvascular flora can provide an alternative food source, particularly for juvenile stages, and a more suitable environment for mites within a crop or pasture Maclennan et al 1998). Cultivation (Tucker 1925;Merton et al 1995), summer pasture burning (Swan 1934;Wallace 1961), maintaining fallow land (Newman 1923;Swan 1934), and flooding of summer pastures (James and O'Malley 1991) can also reduce mite numbers, however, these are not usually considered feasible for current farming methods.…”

Section: Other Cultural Controlsmentioning

confidence: 99%

Biology, ecology and control of the Penthaleus species complex (Acari: Penthaleidae)

2004

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Blue oat mites, Penthaleus spp. (Acari: Penthaleidae), are major agricultural pests in southern Australia and other parts of the world, attacking various pasture, vegetable and crop plants. Management of these mites has been complicated by the recent discovery of three cryptic pest species of Penthaleus, whereas prior research had assumed a single species. The taxonomy, population genetics, ecology, biology and control of the Penthaleus spp. complex are reviewed. Adult Penthaleus have a dark blue-black body approximately 1 mm in length, and eight red-orange legs. Within Australia, they are winter pests completing two or three generations a season, depending on conditions. The summer is passed as diapausing eggs, when long-distance dispersal is thought to occur. The Penthaleus spp. reproduce by thelytokous parthenogenesis, with populations comprising clones that differ ecologically. The three pest Penthaleus spp. differ markedly in their distributions, plant hosts, timing of diapause egg production and response to pesticides, highlighting the need to develop control strategies that consider each species separately. Chemicals are the main weapons used in current control programs, however research continues into alternative more sustainable management options. Host plant resistance, crop rotations, conservation of natural enemies, and improved timing of pesticide application would improve the management of these pests. The most cost-effective and environmentally acceptable means of control will result from the integration of these practices combined with the development of a simple field-based kit to distinguish the different mite species.

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Soil microflora as hosts of redlegged earth mite (Halotydeus destructor)

Cited by 15 publications

References 9 publications

Competitive Interactions Between Two Pest Species of Earth Mites, <I>Halotydeus destructor</I> and <I>Penthaleus major</I> (Acarina: Penthaleidae)

Competitive Interactions Between Two Pest Species of Earth Mites, <I>Halotydeus destructor</I> and <I>Penthaleus major</I> (Acarina: Penthaleidae)

Survival and reproduction of the pest mites Balaustium medicagoense and Bryobia spp. on winter grain crops

Biology, ecology and control of the Penthaleus species complex (Acari: Penthaleidae)

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