• Title/Summary/Keyword: 중순

Search Result 972, Processing Time 0.023 seconds

Seasonal Paddy Management Options for the Safe Use of Golden Apple Snails (Pomacea canaliculata) in Eco-friendly Rice Cultivation (친환경 벼 재배지에서 왕우렁이(Pomacea canaliculata) 안전사용을 위한 시기별 논 관리요령)

  • Lee, Jin-Hee;Choi, Duck-Soo;Kim, Hyo-Jeong․;Cho, A-Hae;Kim, Ji-In;Hong, Sung-Jun
    • Korean Journal of Organic Agriculture
    • /
    • v.31 no.4
    • /
    • pp.413-426
    • /
    • 2023
  • These experiments were conducted for 3 years from 2021 to 2023 to develop a method that can be safely used to prevent the leakage of Golden apple snails (Pomacea canaliculata) from eco-friendly rice plantations. In the southern part of Jeollanam-do, after planting rice, the young golden apple snails placed in the rice field become adults around mid-July and begin spawning. These individuals can overwinter in drains that do not dry out, but individuals hatched after mid-July will not mature enough to overwinter. The size of golden apple snails overwintered in the drainage canal was more than 2.5cm in shell height. Installing a net at the inlet could block 95% of the inflow of snails, and 99% of outflow was blocked by installing an improved water trap and net at the drain. During the mid-drying period and pre-harvest drying period, a water path was created with a power paddy pottery machine. 59.5% of snails were attracted to the waterway, and it took 130 minutes to build the waterway and collect the snails. Based on these results, seasonal paddy management tips for the safe use of giant snails in rice fields were suggested.

The Effect of Covering Materials on Prolongation of Green Period in Zoysiagrass and Cool-season Grass in Early Winter (피복이 한국잔디 및 한지형 잔디의 초겨울 녹색기간연장에 미치는 영향)

  • Lee Jae-Pil;Kim Seok-Jeong;Shin Seok-Hoon;Kim Doo-Hwan
    • Asian Journal of Turfgrass Science
    • /
    • v.18 no.3
    • /
    • pp.129-139
    • /
    • 2004
  • This study conducted to find out the best way to prolong green period of Zoysiagrass and Cool-season grass from 1999 to 2001 in Korea. Treatments were control, vinyl, black shade net, green shade net, black shade net+vinyl, green shade net+vinyl, vinyl+black shade net, and vinyl+green shade net for Zoysiagrass. For cool-season grass, treatments were control, non-punched vinyl and punched vinyl. Data on temperature, light intensity, humidity, leaf color and chlorophyll were collected. Plot size was 2 by 2 and the experiment was conducted using completely randomized design with three replication. Zoysiagrass Green period of Zoysiagrass depended on temperature and light intensity than humidity. Effective method of prolongation of green period in Zoysiagrass was to covered it with vinyl during early October to early November, and then using vinyl+black shade net from end of November. Cool-season grass Effective method of prolongation of green period in Cool-season grass was by covering it with vinyl during mid-November to mid-December, and then using vinyl+black shade net from end of December.

Seasonal Occurrence of Azalea Lace Bug Stephanitis Pyrioides (Hemiptera: Tingidae) on Chonbuk (전북지역에 발생하는 진달래방패벌레(노린재목:방패벌레과)의 발생소장)

  • 황창연;최선우
    • Korean journal of applied entomology
    • /
    • v.37 no.1
    • /
    • pp.49-52
    • /
    • 1998
  • This study was carried to investigate the seasonal occurrence of Step17~initisp yr-ioide.~ Scott (Hemiptera : Tingidae) in a azalea field at Wan.1~. Chonbuk, Korea in 1994. S, pyr-ioic1c.c had LIP to four generations in Chonbuk. The peaks of adult population for each generation were late May, mid-July. late-August, iuid mid-October. respectively. S. pyrioidrs overwintered as egg stage within the midribs of the host leaves.

  • PDF