जागतिक: दुकानात आर्द्रता ९०% पेक्षा जास्त राहिल्यास, ३-४ महिन्यांनंतर पदार्थांवर चांदीसारखा थर (सिल्व्हर स्कर्फ) अनेकदा दिसून येतो.
की टेकवे
- 3–4 months in store before silver scurf symptoms show
- 90% humidity or higher favours silver scurf development
- 0.5°C per day pull-down is advised to slow the disease
- 3 years out of potatoes is the rotation advised in PNW
हे महत्वाचे का आहे
- शेतकऱ्यांसाठी
- योजना केल्यानंतर त्वरित उचलणे haulm चांदीसारख्या खवलेयुक्त रोगाची शक्यता असलेल्या शेतांमध्ये मृत्यू टाळा आणि कंदांपेक्षा हवा किंचित थंड ठेवून बाष्पीभवन टाळा.
- व्यापाऱ्यांसाठी
- नवीन वर्षानंतर धुतलेल्या मालाच्या किरकोळ विक्री कार्यक्रमात समाविष्ट करण्यापूर्वी, साठवलेल्या मालाच्या पृष्ठभागाची चमक तपासा.
- पुरवठादारांसाठी
- Offer seed lots with a silver scurf test result and advice on seed treatment registered in the buyer country
६०-सेकंदांचा सारांश
Silver scurf is a slow store disease that mainly hurts washed and packed potatoes, because buyers judge them on skin finish. Guidance from Maine and the US Pacific Northwest agrees that humidity over 90% favours the fungus and that blemishes tend to show after three to four months in storage, around the time many lots are washed for retail. Warmth above roughly 3 to 4°C and, above all, condensation on tubers help it spread. AHDB in Britain recommends cooling at about half a degree per day and cleaning stores every season, while Wisconsin pathologists urge prompt lifting after vine kill. The awkward point is that high humidity is also needed to limit weight loss, so managers must avoid free water rather than dry the air. Packers, seed buyers and store operators should all watch this. The sources give no loss percentages, so the economic impact depends on each market and grade standard.
Silver scurf is a skin disease of potato caused by the fungus Helminthosporium solani. It leaves silvery, shiny patches on the tuber skin. The damage is cosmetic, but washed and packed potatoes can lose their market grade.
Symptoms often develop in store. The Pacific Northwest Plant Disease Management Handbook says symptoms begin 3 to 4 months after storage. University of Maine Cooperative Extension says symptoms can appear after about four months of storage. Both sources say that high humidity above 90% favours the disease.
Temperature and humidity in store
The Maine bulletin names temperatures greater than 38°F, or 3.3°C, as favourable for silver scurf. The Pacific Northwest handbook says storage below 40°F, or 4.4°C, slows disease development. Cooler temperatures, lower humidity and good ventilation all retard the disease, according to Maine.
आठवड्याचे दिवस. एका क्लिकमध्ये सदस्यता रद्द करा.
This creates a conflict for store managers. Potatoes need high humidity to limit weight loss. Silver scurf prefers the same conditions. Condensation is the biggest problem, according to the levy board AHDB in the United Kingdom. It forms when warm air meets cooler tubers.
AHDB suggests rapid temperature pull-down of 0.5°C per day to hold back the disease. It also advises routine annual store cleaning.
शेतात
The longer tubers stay in the soil, the more likely silver scurf becomes a problem, AHDB said. Early lifting can reduce incidence. The University of Wisconsin potato pathology team made a similar point in September 2025. It advised harvesting promptly after vine desiccation to limit both silver scurf and black dot.
Infected seed is a key source of the disease. The Pacific Northwest handbook recommends rotating out of potatoes for at least three years. The Maine bulletin says the pathogen can survive in soil for up to two years without potatoes. Seed treatments and treatments at harvest into store are available, but registrations differ by country.
हे महत्वाचे का आहे
Packers are strict on skin finish. A crop that looks clean at loading can fail inspection in January or February. That is when many stored lots are washed for retail.
The practical steps are simple. Lift promptly after haulm death, cool quickly, avoid condensation and clean the store every year. Seed buyers should check silver scurf levels before planting.
Photo: Silver scurf (Helminthosporium solani) on a potato tuber (illustrative). Scot Nelson / विकिमीडिया कॉमन्स, CC0
जागतिक बटाटा संक्षिप्त माहिती
प्रमुख पाच बातम्या, किमती, आजारांविषयी सूचना आणि कार्यक्रम. आठवड्याच्या दिवसांत सकाळी, जाहिराती नाहीत.
सूत्रांनी दिलेल्या माहितीनुसार,
- University of Maine Cooperative Extension — Bulletin #2444, Silver Scurf of Potato — https://extension.umaine.edu/publications/2444e/
- Pacific Northwest Plant Disease Management Handbook — Potato: Silver Scurf — https://pnwhandbooks.org/plantdisease/host-disease/potato-solanum-tuberosum-silver-scurf
- AHDB — Silver Scurf — https://potatoes.ahdb.org.uk/knowledge-library/silver-scurf
- University of Wisconsin–Madison Vegetable Pathology — Late-Season Management of Black Dot and Silver Scurf (7 Sep 2025) — https://vegpath.plantpath.wisc.edu/2025/09/07/late-season-management-of-black-dot-and-silver-scurf-in-wisconsin-potatoes/
या सामग्रीमध्ये जोडलेले
- देश
- जागतिक
संबंधित कथा
ग्लोबल: Fusarium जुन्या बुरशीनाशकांचा प्रभाव कमी झाल्यामुळे, साठवलेल्या बटाट्यांना कोरडा कुजवा लागून त्यांचे ६ ते २५% नुकसान होऊ शकते.
जागतिक: बटाट्याचा गर १८°C पेक्षा जास्त तापमानावर काढल्यास गळती आणि गुलाबी कुजण्याचा धोका वाढतो.
