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Abstract

Problems with spider mites first appeared in Taiwan in 1958, eight years after the importation of synthetic pesticides, and the mites evolved into major pests on many crops during the 1980s. Of the 74 spider mite species recorded from Taiwan 10 are major pests, with Tetranychus kanzawai most important, followed by T. urticae, Panonychus citri, T. cinnabarinus, T. truncatus and Oligonychus litchii. Most crops suffer from more than one species. Spider mites reproduce year-round in Taiwan. Diapause occurs only in high-elevation areas. Precipitation is the most important abiotic factor restricting spider-mite populations. Control is usually accomplished by applying chemicals. Fifty acaricides are currently registered for the control of spider mites. Acaricide resistance is a serious problem, with regional variation in resistance levels. Several phytoseiid mites and a chrysopid predator have been studied for control of spider mites with good effect. Efforts to market these predators should be intensified so that biological control can be a real choice for farmers.

Phylogenetic-Related Divergence in Perceiving Suitable Host Plants among Five Spider Mites Species (Acari: Tetranychidae)

“…For instance, the two-spotted spider mite Tetranychus urticae has been considered one of the most destructive agricultural pests in the world [ 1 ] and can feed on more than 1150 plant species from 140 different plant families [ 2 ]. Additionally, several other species also commonly occur in the field, such as Tetranychus kanzawai , Tetranychus truncatus , Tetranychus pueraricola, and Tetranychus evansi [ 3 , 4 , 5 , 6 , 7 ].…”

First discovery of Tetranychus truncatus in Africa and new records of spider mites (Prostigmata, Tetranychidae) in Burkina Faso

“…There is no doubt than T. truncatus represents an important phytosanitary risk in Burkina Faso and, of course, at the scale of the African continent. Indeed, taking into account its pest status reported in almost all the parts of the world it colonized, particularly in Bengladesh (Tarikul Islam et al, 2017), China (Jin et al, 2018), India (Bhaskar and Lenin, 2018), Taiwan (Ho, 2000), Thailand (Sakunwarin et al, 2004) and Vietnam (Hinomoto et al, 2007), its wide range of potential host plants [92 host plants according to Migeon and Dorkeld (2023)], including major crops (e.g. rice, maize, cassava, several Solanaceae but also cotton) and its ability to develop pesticide resistances (e.g.…”

Biological impact of ultraviolet-B radiation on spider mites and its application in integrated pest management

“…Plant-dwelling mites frequently reside on the lower leaf surfaces of their host plants (Sudo and Osakabe 2011). In addition to topographic differences between adaxial (upper) and abaxial (lower) leaf surfaces (Chien and Sussex 1996;Price 1980;Sakai et al 2012a;Sudo and Osakabe 2013), the preference for lower leaf surfaces by tiny mites (Jeppson 1975;Kiritani 2012Kiritani , 2013 has been attributed to avoidance of harsh environments on upper leaf surfaces such as radiant heat (Lu et al 2014;Perring et al 1984), desiccation (Ferro and Chapman 1979;McEnroe 1961) and rain (Boyne and Hain 1983;Ho 2000;Osakabe 1965;Rêgo et al 2013).…”