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Dispersal of diapausing T etranychus urticae and T . kanzawai
Author(s) -
Ghazy Noureldin Abuelfadl,
Otsuki Hatsune,
Sekido Tomoe,
Yano Shuichi,
Amano Hiroshi
Publication year - 2016
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/eea.12467
Subject(s) - biological dispersal , tetranychus urticae , biology , diapause , overwintering , population , population density , ecology , botany , pest analysis , larva , demography , sociology
The spider mites T etranychus urticae K och and T etranychus kanzawai K ishida ( A cari: T etranychidae) overwinter mostly as mated adult diapausing females. Their overwintering survival depends in part on their dispersal towards suitable habitats. We investigated the dispersal behaviour of diapausing females of T . urticae and T . kanzawai with respect to factors known to affect the dispersal of non‐diapausing mites: light, population density, gravity, and humidity. In general, diapausing females of T . urticae showed a stronger tendency to disperse than did those of T . kanzawai under all test conditions. High population density promoted the dispersal of diapausing T . urticae , but not of T . kanzawai . Dispersal of diapausing females of both species was not significantly affected by gravity, humidity, or whether feeding damage was caused by conspecifics or heterospecifics. On plants, more T . urticae than T . kanzawai moved downward. We propose that dispersal after the onset of diapause may be an important life‐history strategy in T . urticae , but not in T . kanzawai .