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5098509 
Technical Report 
The occurrence and control of slugs in orchid gardens 
Liu, TS; Wang, WJ; Lai, SF 
1997 
39 
2 
165-172 
Chinese 
BIOSIS COPYRIGHT: BIOL ABS. A 2-year survey has revealed that slugs occur rather commonly in orchid gardens in central Taiwan. They damage primarily the leaves, flowers and roots of the orchid plants. Among the five identified species, i.e., Vaginulus alte Ferussac, Vaginulus sp., Parmarion martensi Simroth, Philomycus bilineatus (Benson), and P. pictus Stoliczka, the most abundant species (constituting 69% of a total of 603 slugs collected) was the slender P. martensi Simroth, which was found mainly near the mountains in Taichung city and Taichung vicinity. Life cycle of this slug was subsequently studied in the laboratory. Egg stage lasted 16.5, 14.1 and 12.2 days, respectively, at 20, 24 and 28 ?C. Hatchability ranged between 75 to 96%. It took 66 to 86 days from hatching for the slug to laying egg. Average life span was 84.2 to 150.2 days, with the longest of 271 days. As a hermaphrodite, eggs produced through cross-fertilization could give 95.6% hatchability while eggs produced through self-