Thrips in Medicinal Crops in Korea:Identification and Their Damages

Abstract

: Damages of medicinal crops by thrips and identification of thrips species were investigated by periodic surveys on major medicinal crops, Platycodon grandiflorum, Schizandra chinensis, Codonopsis lanceolata, Lycium chinense, Bupleurum falcatum, Ledebouriella seseloides, Angelica gigas, Glycyrrhiza uralensis, Liriope platyphylla, Atractyloides sp., once or twice a month in Suwon, Eumseong, Jecheon, Pyeongchang, Chyungyang from May to October in 2012. Thrips and their damages were found at all of the medicinal crops investigated, mostly occurring at early growing stages of each medicinal crop and causing apical meristem region withered, thereby inhibiting the growth of plants. For species identification of thrips collected from each medicinal crops, DNA from each individual was extracted and ITS2 and COI regions were amplified by PCR. As a result, Frankliniella intonsa, Thrips tabaci, and Megalurothrips distalis have been identified as dominant species on medicinal crops in open field, whereas Frankliniella occidentalis was restricted to Lycium chinense in which protected cultivation. This study suggests that the occurrence of thrips species on medicinal crops seems to be affected by host specificity and environmental factors such as cultivation types.

Rooting of blackberry (Rubus fruticosus L.) hardwood cuttings as influenced by cutting time and cutting length

“…On the other hand, the results are in agreement with those of previous studies such as Bueno et al,(8), Kahramanoğlu and Umar(17), Kang et al, (18), and Mehta et al, (24) who reported that the cuttings should be collected earlier so as to be succeeded.…”

“…These results might be attributed to the differences in carbohydrate contents of the cutting tissues which act as the main sources of energy needed for root formation (4). Many researchers emphasize the difference in the rooting capacity of cuttings taken at different times (10, 16,18), this could be related to the difference in the hormonal balance that favors the rooting of hardwood cuttings taken at different times (8).…”

Frontiers Approaches to the Diagnosis of Thrips (Thysanoptera): How Effective Are the Molecular and Electronic Detection Platforms?

“…Ribosomal RNA-ITS markers have been used for detection of S. dorsalis , T. palmi , F. tritici (Fitch), F. intonsa (Trybom), F. cephalica (Crawford), H. cahirensis (Trybom), Dendrothrips eremicola Priesner, Kakothrips pisivorus (Westwood), Hydatothrips kassimianus (Priesener), and Ceratothripoides claratris (Shumsher) [ 46 , 114 , 115 , 116 , 117 , 118 ]. ITS has been used as a natural choice of nuclear marker to substantiate mitochondrial marker-based identification and allow multi-locus phylogenetic analyses of F. occidentalis , F. intonsa , F. fusca (Hinds), T. tabaci , and Megalurothrips distalis (Karny) [ 72 , 119 , 120 ]. ITS sequences are also useful in distinguishing cryptic species of F. schultzei [ 97 ], S. dorsalis [ 121 , 122 ], T. tabaci [ 123 , 124 ], and S. aurantii [ 110 ].…”

Molecular Identification of Thrips in Two Medicinal Crops, Cnidium officinale Makino and Ligusticum chuanxiong Hort

“…장 발생 해충조사 (Kim, 1994), 경남지역 5 종 약용작물에 대한 해충조사 (Shin et al, 2002), 약용작물 전시포 발생 곤 충상 조사 (Lee et al, 2007) 및 약용작물 발생 총채벌레류 종류 및 피해조사 (Kang et al, 2012) (Yudin et al, 1986;Ananthakrishan, 1993 (Bailey, 1948;Köppä, 1970;Nakahara, 1995;Mound and Kibby, 1998) 높은 생식능력으로 빠르게 개체군을 형성하여 작물에 심각한 피해를 준다 (Jiang et al, 2015(Jiang et al, , 2016 (Kamm, 1971;Mound and Masumoto, 2009). 특 히 피해 받은 티모시는 품질이 크게 감소하며, 종자로부터 출 아한 옥수수 떡잎이 피해를 받게 되면 수량이 크게 감소된다 (Reisig et al, 2009).…”