Air Drift of Spider Mites1

Fleschner, C. A.; Badgley, M. E.; Ricker, D. W.; Hall, J. C.

doi:10.1093/jee/49.5.624

Cited by 58 publications

(45 citation statements)

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“…The threads serve as 'lifelines' throughout the mites' lives on their host plants (Saito, 1979). These 'lifelines' are used by blown-off or dispersing mites, as the threads taken up by winds and the animals drift along in the air streams (Fleschner et al, 1956). In our study, we found thick and thin ropes, The thicker threads extended from the top of the stalk and divided before fixation with the host leaves.…”

Section: Discussionsupporting

confidence: 46%

The Weaving Pattern and Structure of the Guy Ropes in Citrus Red Mite, Panonychus citri (McGregor) (Acari: Tetranychidea)

Razaq¹,

Mohammad²,

Shiraishi³

et al. 2000

Pakistan J. of Biological Sciences

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Abstract:The pattern of weaving by guy ropes in association with egg stalk was observed under scanning electron microscope in Panonychus citri (McGregor). The egg stalk was vertical having a base of 15.5 µm wide and its length was 146 µm. Initially few guy ropes extended from the tip of the stalk to the leaf surface of host plant. The ropes rolled up to 125 µm on the stalk tip and were stretched towards the surface. Several thin ropes combined together to form strong strand. The ropes were roughly surfaced and possessed granular materials. The development of new net was accomplished with further extension of thinner ropes, which were twisted over the thicker ones and pasted on the leaf. Mites used adhesive material for the fixation of threads on the leaf as well as for webbing. The thick guy ropes were segregated before sticking on the leaf surface. The surface of the leaf was covered with adhesive, which was invisible. Several ropes overlaps the hatching egg vertically and horizontally.

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Section: Discussionsupporting

confidence: 46%

The Weaving Pattern and Structure of the Guy Ropes in Citrus Red Mite, Panonychus citri (McGregor) (Acari: Tetranychidea)

Razaq¹,

Mohammad²,

Shiraishi³

et al. 2000

Pakistan J. of Biological Sciences

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“…Crawling ensures dispersal in two ways: (a) between adjacent plants and (b) on the same plant from older leaves to new ones, usually from the base to the top of the plant as density increases and older leaves become unsuitable (Hussey & Parr, 1963). To colonize new plants, mites may let themselves be blown away or may drop to the soil, after hanging at the end of their silk line for some time (Fleschner et a!., 1956). …”

Section: Discussionmentioning

confidence: 99%

Population structure in the spider mite Tetranychus urticae (Acari: Tetranychidae) from Crete based on multiple allozymes

et al. 1997

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Montpe/Iier II (case courrier 065), P/ace S. Batail/on, 34095 Montpe//ier and tLaboratoire de Zoo/ogle, INRA, Z P/ace P. Via/a, 34060 Montpe//ier, FranceThe polymorphism of four isozymes was studied on single females of Tetranychus urticae from Crete (Greece), using an isoelectric focusing technique. Genetic differentiation was found to be correlated with distance but not with the species of colonized host-plants. Thus no differentiation was observed between samples collected on citrus trees, tomato, pumpkin, okra or weed plants located within a 50 m2 area, showing that at this geographical scale T urticae populations are panmictic. In contrast, samples from plants at 150 m or more from one another displayed a significant genetic differentiation. These results are discussed in relation to the known pattern of migration in the species.

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“…Aerial dispersal thus appears to provide a mechanism for betweentree, between-row, and longer range movements of both predator and prey in almonds. Stabler ( 1913) first observed aerial movements of spider mites in California almonds, and Fleschner et a/. (1956 ), Boykin & Campbell (1983), Brandenburg & Kennedy ( 1982), and others have described large scale aerial movements of spider mites in other crops.…”

Section: Discussionmentioning

confidence: 99%

Influence of aerial dispersal on persistence and spread of pesticide‐resistant Metaseiulus occidentalis in California almond orchards

Hoy

Groot

Baan³

1985

Entomologia Exp Applicata

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Aerial dispersal of the· phytoseiid Metaseiulus occidentalis (Nesbitt) was evaluated as a component in managing pesticide-resistart populations established in California almond orchards. Peak dispersal occurred in late July and early August during 1982 and 1983. Most predators (and spider mites) left the orchards on the prevailing winds from the northwest. Within the orchard, the prevailing winds had less influence, and dispersal was usually random. Both spider mites and predators dispersed randomly with regard to height from the almond trees, but data obtained during one 24-h interval suggest they do not disperse randomly throughout the day. Most aerial movements occurred between 16-22 h when relative humidity and wind speeds increased and temperatures decreased. Spider mites and predators were trapped on panels located 200 m from the orchard. A survey of carbaryl resistance levels in M. occident a/is collected from almond orchards surrounding the release sites indicates that carbaryl-resistant M. occident a/is dispersed at least 800 m between 1981-83. However, growers wishing to use the resistant strains should release them in their orchards as natural dispersal appears to be too slow. Migration of native M. occidentalis into the release sites appeared to be sufficiently rare that dilution of carbaryl-resistant populations was minimal during a 2-4 year period.

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Air Drift of Spider Mites1

Cited by 58 publications

References 0 publications

The Weaving Pattern and Structure of the Guy Ropes in Citrus Red Mite, Panonychus citri (McGregor) (Acari: Tetranychidea)

The Weaving Pattern and Structure of the Guy Ropes in Citrus Red Mite, Panonychus citri (McGregor) (Acari: Tetranychidea)

Population structure in the spider mite Tetranychus urticae (Acari: Tetranychidae) from Crete based on multiple allozymes

Influence of aerial dispersal on persistence and spread of pesticide‐resistant Metaseiulus occidentalis in California almond orchards

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