Seasonal occurrence of larval trombiculid mites by Tullgren's funnel method in Kagoshima Prefecture for three years,with a few references to morphological variations

Abstract

Seasonal occurrence of larval trombiculid mites was surveyed at two adjacent areas using Tullgren s funnel method for three years. Larval trombiculid mites were collected every month from April 2004 to March 2007 at two adjacent areas of Aira City, Kagoshima Prefecture. Twenty trombiculid species were collected from soil samples: Neotrombicula mitamurai, Eltonella ichikawai, Miyatrombicula kochiensis, Cheladonta ikaoensis, Doloisia uchikawai, Helenicula miyagawai, Mackiena todai, Neoschoengastia shiraii, Schoutedenichia nagasakiensis, Walchia koshikiensis, W. ogatai and Gahrliepia saduski.Almost all species were collected in February and March, and only seven species were collected in June and July. L. scutellare was the most abundant in number, followed by L. fuji. erefore, L. scutellare and L. fuji seemed to be the dominant species in the survey areas. e morphological variation of C. ikaoensis was also observed. e scutum of C. ikaoensis was very wide, especially PW much wider than AW, and variable in the number of rst post humeral row of dorsal setae.

Infestation and seasonal fluctuation of chigger mites on the Southeast Asian house rat (Rattus brunneusculus) in southern Yunnan Province, China

“…6 ). The result is consistent with that in some other provinces of China and some other countries ( Choi et al, 2018 ; Li et al, 1997 ; Liu et al, 2004 ; Noda et al, 2013 ; Park and Shin, 2016 ; Pham et al, 1999 ; Wu et al, 2000 ; Yuan et al, 2003 ). Although the seasonal fluctuation curves of L. ( L. ) scutellare vary in different provinces of China, the basic pattern belongs to the autumn-winter type with the seasonal peak in cold seasons, late autumn and winter ( Bang et al, 2008 ; Elliott et al, 2019 ; Santibáñez et al, 2015 ; Tilak and Kunte, 2019 ).…”

“…The five main chigger species had their own seasonal fluctuation patterns. Before the present study, some previous investigations had reported the seasonal fluctuations of L. ( L. ) deliense , L. ( L. ) scutellare and A. indica in some other provinces of China and some other countries ( Frances et al, 1999 ; Kim et al, 2019 ; Li et al, 1997 ; Noda et al, 1996 , 2013 ; Wu et al, 2013 ), but no literature was on the seasonal fluctuations of W. ( W. ) micropelta and W. ( W. ) turmalis . In the present study, the Cr , MA and MI of W. ( W. ) micropelta were relatively high from March to July with a slight peak in May and the mite had an irregular seasonal fluctuation without an obvious peak ( Fig.…”