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Chapter 8 Acarid mites
tin and Workman (1985); Czaikowska et al. (1988); Czajkowska and Kropczynska (1991); Kurosa and Nakao (1993); Fischer (1993); Kadono and Endo (1996).
Egg-adult duration (days)
25 20 15
T. neiswanderi T. putrescentiae
10 5 0
Freesia Crocus 1 2 corms corms
Tulip 3 bulbs
Hyacinth 4 bulbs
Fig. 8.8 Egg to adult developmental time of Tyrophagus neiswanderi and Tyrophagus putrescentiae on four host plants at 25°C (drawn from data in Czajkowska and Kropczynska, 1991).
8.4.3.5 Tyrophagus perniciosus Zachvatkin This mite is usually associated with stored products and houses. In Japan, T. perniciosus attacks cucumbers, melons and pumpkins. It is known to feed on the mycelium of Sporidesmium mucosum var. pluriseptatum, the fungus causing brown mosaic disease of cucumber in greenhouses in the former Kazakh SSR, USSR. This is a relatively large mite, with adult females 550-700 µm long and adult males 450-500 µm long. The supracoxal seta gradually expands basally with setules becoming shorter towards the distal end (Fig. 8.3.6B). Setae d1 are 2.5-4.5 times as long as d2. Solenidion ω1 on tarsus I is relatively short and slightly expanded distally. The aedeagus in the male is arched and truncate distally (Fig. 8.3.6B). Little is known about the biology and control of this species. References & suggested further reading. Hughes (1976); Sadieva (1984); Nakao (1991).