Distribution and mode of infection of golden snail in rice farming
1991
Rondon, M.B. | Callo, D.P. (Philippine Rice Research Inst., Maligaya, Munoz, Nueva Ecija (Philippines))
The golden snail has become a major pest throughout the Philippines. In 1988, infestations were reported from Visayas and Mindanao. The golden snail reproduces rapidly. An egg cluster (about 25-500 eggs) hatches in 8-15 days with 80% success. The young-snail start crawling when they reach 2-5 mm in size. Young rice seedlings are very susceptible to snail damage. Rice plant damage is most severe for young plants up to eight days after transplanting. The snails attack the base of the young seedlings before devouring the upper parts. Severely damaged ricefields are characterized by missing hills and floating cut fragments of rice plants. Golden snails can survive even out of water bacause of their breathing organs. When fields are drained, the snails can aestivate. The golden snail is now a problem in all rice-growing regions of the Philippines. The total area infested as of December 1988 is about 126,000 ha. The highest infestations are in Regions 6 (Western Visayas), 12 (Central Mindanao), and 2 (Cagayan Valley). The lowest infestation has been reported from Region 7 (Central Visayas).
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