INGESTION OF PYTHIUM SPP BY LARVAE OF THE FUNGUS GNAT BRADYSIA-IMPATIENS (DIPTERA, SCIARIDAE)
INGESTION OF PYTHIUM SPP BY LARVAE OF THE FUNGUS GNAT BRADYSIA-IMPATIENS (DIPTERA, SCIARIDAE)
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DOI：
10.1111/j.1744-7348.1990.tb06600.x
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发表时间：
1990-04-01
影响因子：
2.6
通讯作者：
SHIPP, JL
中科院分区：
文献类型：
--
作者：
GARDINER, RB;JARVIS, WR;SHIPP, JL
用皮孢囊的菌丝、卵孢子和游动孢子喂养凤仙花小蚊幼虫。真菌结构全部被消化，为虫卵到成虫的发育提供了完整的营养来源。菌丝似乎是主要的食物来源，因为只有在消化道或幼虫粪便中发现了空碎片。卵孢子在通过生殖道和排出时都是完整的和可存活的。卵孢子萌发正常。大多数被包裹的游动孢子也能通过肠道存活下来，尽管有些看起来已经受损。将新近进食的幼虫转移到新的食物来源后，48 h后消化道中仍检测到卵孢子。结果表明，凤蝶幼虫期可能是侵染毕氏霉的重要媒介。
Mycelium, oospores and zoospore of cysts of Pythium spp. were fed to larvae of the fungus gnat Bradysia impatiens. The fungal structures were all ingested and provided a complete nutritional source for the insect''s development from egg to adult. Mycelium seemed the major source of food as only empty fragments were found either in the digestive tract or in larval faeces. Oospore appeared intact and were viable both during passage through the tract and when expelled. Germination of oospores was normal. Most encysted zoospores also survived passage through the gut, although some appeared damaged. After transferring recently-fed larvae to a new food source, oospores were still detected in the digestive tract 48 h later. These results show that the larval stage of B. impatiens may serve as an important vector for Pythium spp.