• Title, Summary, Keyword: potato tuber moth

Search Result 8, Processing Time 0.052 seconds

Description of the Diadegma fenestrale (Hymenoptera: Ichneumonidae: Campopleginae) Attacking the Potato Tuber Moth, Phthorimaea operculella (Lep.: Gelechiidae) New to Korea

  • Choi, Jin-Kyung;Kim, Ju Il;Kwon, Min;Lee, Jong-Wook
    • Animal Systematics, Evolution and Diversity
    • /
    • v.29 no.1
    • /
    • pp.70-73
    • /
    • 2013
  • Diadegma fenestrale is known as a parasitoid of the potato tuber moth, Phthorimaea operculella. The potato tuber moth, Phthorimaea operculella (Zeller) is one of the most destructive pest of potatoes. Also, we found this species attacking the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). Ratio of parasitism is 20-30% and cocoon of lepidopteran was parasitic ichneumonid species after 3 days. This species and the genus Diadegma are recorded for the first time from Korea. In this paper, description of the parasitoid and photographs of the diagnostic characteristics are provided.

Sequential sampling method for monitoring potato tuber moths (Phthorimaea operculella) in potato fields

  • Jung, Jae-Min;Byeon, Dae-hyeon;Kim, Eunji;Byun, Hye-Min;Park, Jaekook;Kim, Jihoon;Bae, Jongmin;Kim, Kyutae;Roca-Cusachs, Marcos;Kang, Minjoon;Choi, Subin;Oh, Sumin;Jung, Sunghoon;Lee, Wang-Hee
    • Korean Journal of Agricultural Science
    • /
    • v.47 no.3
    • /
    • pp.615-624
    • /
    • 2020
  • An effective sampling method is necessary to monitor potato tuber moths (Phthorimaea operculella) because they are the biggest concern in potato-cultivating areas. In this study, a sequential sampling method was developed based on the results of field surveys of potato tuber moths in South Korea. Potato tuber moths were collected in fields cultivating potatoes at six sites, and their spatial distribution was investigated using the Taylor power law. The optimal sampling size and cumulative number of potato tuber moths in traps to stop sampling were determined based on the spatial distribution pattern and mean density of the collected potato tuber moths. Finally, the developed sampling method was applied to propose a control action, and its sampling efficiency was compared with that of the traditional sampling method using a binomial distribution. The potato tuber moths tended to aggregate; the optimal number was approximately 5 - 16 traps for sampling, and the number varied with the mean density of potato tuber moths according to the sampling sites. In addition, one, two, and three sites might require the following actions: Continued sampling, control, and no control, respectively. Sampling with the binomial distribution showed the minimum sample size was 12 when considering the economic threshold level. Here, we propose an effective sampling method that can be applied for future monitoring and field surveys of potato tuber moths in South Korea.

The Potato Tuber Moth (Phthorimaea Operculella Zeller ) Distribution and Damage to Tobacco Plants (감자나방 (Phthorimaea opercullella Zeller)의 생분포와 피해에 관한 조사)

  • 손준수
    • Journal of the Korean Society of Tobacco Science
    • /
    • v.1 no.1
    • /
    • pp.51-55
    • /
    • 1979
  • The potato tuber moth (Phthorimaea operculella Zeller ) was surveyed for its distribution and damage to tobacco plants in field. The insect was found in all four localities examined ; Dalseong and youngdeog of Gyeongbuk Province, and Boseong and Jindo island of Cheongnam Province. About half of the tobacco plants examined contained the larvae with the highest level (76.7%)of larvae infestation in the Jindo island. In a given tobacco plant the larvae were concentrated on the first three leaves, from bottom, with 82.4 5 of the total number, and a single leaf usually has one to three larval.

  • PDF

Pyramiding transgenes for potato tuber moth resistance in potato

  • Meiyalaghan, Sathiyamoorthy;Pringle, Julie M.;Barrell, Philippa J.;Jacobs, Jeanne M.E.;Conner, Anthony J.
    • Plant Biotechnology Reports
    • /
    • v.4 no.4
    • /
    • pp.293-301
    • /
    • 2010
  • The feasibility of two strategies for transgene pyramiding using Agrobacterium-mediated transformation was investigated to develop a transgenic potato (Solanum tuberosum L. cv. Iwa) with resistance to potato tuber moth (PTM) (Phthorimaea operculella (Zeller)). In the first approach, cry1Ac9 and cry9Aa2 genes were introduced simultaneously using a kanamycin (nptII) selectable marker gene. The second approach involved the sequential introduction (re-transformation) of a cry1Ac9 gene, using a hygromycin resistance (hpt) selectable marker gene, into an existing line transgenic for a cry9Aa2 gene and a kanamycin resistance (nptII) selectable marker gene. Multiplex polymerase chain reaction (PCR) confirmed the presence of the specific selectable marker gene and both cry genes in all regenerated lines. The relative steady-state level of the cry gene transcripts in leaves was quantified in all regenerated lines by real-time PCR analysis. Re-transformation proved to be a flexible approach to effectively pyramid genes for PTM resistance in potato, since it allowed the second gene to be added to a line that was previously identified as having a high level of resistance. Larval growth of PTM was significantly inhibited on excised greenhouse-grown leaves in all transgenic lines, although no lines expressing both cry genes exhibited any greater resistance to PTM larvae over that previously observed for the individual genes. It is anticipated that these lines will permit more durable resistance by delaying the opportunities for PTM adaptation to the individual cry genes.

Studies on the Life History of Potato Tuber Moth, Phthorimaea operculella (Zeller) (Lepidoptera; Gelechiidae) (감자나방의 생활사에 관한 연구)

  • Choe Kwang-Ryul;Yoo Chang-Gu;Chang Young-Duck
    • Korean journal of applied entomology
    • /
    • v.19 no.2
    • /
    • pp.97-101
    • /
    • 1980
  • Present studies were carried out to investigate the life history of potato tuber moth, Phthorimaea operculella (Zeller), under laboratory conditions in Suweon. Studies on its life-cycle on stored potato tubers in the laboratory showed that seven generations were reared in a year and the development from egg to adult was completed in an average of 49.4 days in spring at $18.2^{\circ}C$., 21 days in summer at $26.8^{\circ}C$., 26.1 days at $24.2^{\circ}C$., and 39 days in autumn at $19.6^{\circ}C$. The females laid an average of 101 eggs each, with a maximum of 242 and longevity of adults 17.6 days in spring at $15.1^{\circ}C$., 8.1 days in May-September at $25.3^{\circ}C$., and 13.3 days in autumn at $16.8^{\circ}C$.

  • PDF

Potato Pests Observed in Seed Potatoes, North Korea during 2001 to 2005 (북한 씨감자 생산에서의 병해충 발생(2001-2005))

  • Hahm Young-Il
    • Research in Plant Disease
    • /
    • v.12 no.1
    • /
    • pp.1-4
    • /
    • 2006
  • During visiting North Korea from 2001 to 2005, I have had a few chances to observe and discuss several North Korean scientists for the seed production program and also, the occurrence of potato pests. Healthy seed production, especially in the early generations, e.g. the production of virus-free starting materials as well as in vitro pre-basic seeds (G0) by hydroponics and basic seeds under netted houses according to her new national seed potato program of Academy of Agricultural Science, Pyongyang, North Korea, has been done well so far. Some major pests occurred, however, in the early generations such as pre-basic seed (G0) in greenhouse, basic seed (G1) in screenhouse, foundation seed-I (G2) and even ware potatoes in the fields are Phytopitthora infestans, Spongospora subterrunea, Ralstonia solanacearum, Pythium spp. and some viruses such as Potato virus X, Potato virus Y, Potato leafroll virus, and also larger potato ladybeetle, greenhouse whitefly and potato tuber moth. Therefore, the success of healthy seed production in North Korea will be thoroughly depended on the pest control and the multiplication of virus-free seed stocks in the isolated areas, especially where no infected potatoes are grown.

Recent Trend and Prospects of Potato Industry in Kazakhstan (카자흐스탄의 감자산업 동향과 전망)

  • Im, Ju Sung;Seo, Sang Gi;Kim, Mee Ok;Cheon, Chung Gi;Park, Young Eun;Cho, Ji Hong;Cho, Kwang Soo;Chang, Dong Chil;Choi, Jang Kyu;Lee, Jong Nam;Koo, Bon Cheol
    • Journal of the Korean Society of International Agriculture
    • /
    • v.30 no.3
    • /
    • pp.177-183
    • /
    • 2018
  • Potato cultivation area in Kazakhstan has been steadily increasing for ten years from 154,000 ha in 2006 to 186,000 ha in 2016. The production amounts are also increasing from 2,360,000 tons in 2006 to 3,550,000 tons in 2016. The average yield(/ha) was 19.0 ton in 2016 while 15.4 tons in 2006. The import volume increased by about 3.2 folds for seven years from 34,874 tons in 2006 to 112,323 tons in 2013. The import price(/ton) has been also showing steady increasing from $180(USD) in 2006 to $202(USD) in 2013. The export volume dramatically increased from 73 tons in 2006 to 8,455 tons in 2013. It shows that the potato trade with neighboring countries is very active recently. Kazakhstan need seed potato of around 700,000 tons each year, which is more than the total production yield (600,000 tons/year) of Korean potato. Seed potatoes are imported from Europe by the private seed companies and then distributed to farmers after multiplications for two or three years. Potatoes are sown in May and harvested in September or October, which is similar to the summer cropping in Korean potato. The European cultivars such as 'Sante' and 'Rodeo' are preferred broadly due to their high temperature resistance, salt tolerance, long dormancy period, and yellow flesh color. Meanwhile, Early blight and Colorado potato beetle are known as the main problems at Kazakhstan potato fields. The big yield loss by insects or diseases during storage is one of the severe problems too. Considering the internal and external circumstances of Kazakhstan potato, it is expected that the Korea's high-quality seed potatoes and the post-harvest management technologies could be helpful to enter the Kazakhstan potato market effectively as well as to increase the market competitiveness.