๋ฟ๋ฆฌ ์ฉ์๋ณ์ ๋ณ์์ฑ ์์ ๊ณฐํก์ด(์ฃผ๋ก Pythium๊ณผ Phytophthora ์ข )์ ์ํด ๋ฐ์ํ๋ ์๋ฌผ ๋ณํด๋ก, ๊ณผ์ตํ๊ฑฐ๋ ์ฐ์๊ฐ ๋ถ์กฑํ ํ๊ฒฝ์์ ์๋ฌผ ๋ฟ๋ฆฌ๋ฅผ ๊ณต๊ฒฉํ๊ณ ๋ถํดํฉ๋๋ค. ๊ฐ์ผ๋ ๋ฟ๋ฆฌ๋ ๊ฐ์์ด๋ ๊ฒ๊ฒ ๋ณํ๊ณ ๋์ ํด์ง๋ฉฐ ๋ฌผ๊ณผ ์๋ถ์ ํก์ํ๋ ๋ฅ๋ ฅ์ ์์ต๋๋ค.
์ฃผ์ ์ฌ์ค
- Primary pathogens: Pythium and Phytophthora water moulds, often pre-existing in water supplies
- Triggered by: insufficient dissolved oxygen, warm reservoir temperatures, and stagnant water
- Symptoms: brown/black slimy roots, wilting despite adequate water, yellowing leaves
- Prevention: maintain dissolved oxygen with air stones, keep reservoir below 20ยฐC (68ยฐF)
- Treatment: beneficial bacteria (Bacillus subtilis, Trichoderma) can suppress Pythium
- Hydrogen peroxide (3 mL of 3% per litre) can sterilise severely infected reservoirs