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莫斯科州灌溉農田土壤中蛔虫卵的发育从五月末或六月初开始,七月完成。观察表明,蛔虫卵生活力依賴于气候因素、埋置虫卵的条件(样品埋置深度、背蔭或有陽光照射)以及灌溉某种蔬菜的污水量和灌溉期限。土表蛔虫卵由于过分干燥、过热以及一晝夜內土表溫度变化巨大而死亡最快(几天至3-4个月)。可耕層的深度內晝夜溫度变化小,土壤有足够湿度(不低于5％),使蛔虫卵能够長期生存,並保持侵袭力达2.5年。
Ascaris eggs develop in irrigated farmland in Moscow state from late May or early June and completed in July. Observations have shown that roundworm egg viability depends on climatic factors, the conditions under which the eggs are embedded (sample depth, shade or sunlight), and the amount of sewage and period of irrigation for a particular vegetable. Ascaris eggs die fastest (days to 3-4 months) due to over-drying, overheating, and tremendous changes in soil surface temperature over a single day or night. The depth of the arable layer changes in small temperature and day and night, the soil has enough humidity (not less than 5%), so that Ascaris eggs can survive long-term, and maintain invasive power of 2.5 years.