PENGARUH CARA PENGAIRAN DAN VARIETAS PADI LOKAL (Oryza sativa L.) TERHADAP KELIMPAHAN JENIS HAMA KEONG
HILMAN, FAHMI FARIZQI PUTRA
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Efforts to increase the yield of rice production have many challenges, one of which is pest competition. Snails are one of the important pests of rice. Regulating the irrigation system and planting rice varieties is hypothesized to be an effort that can be done in controlling this pest. The purpose of this research is to study the effect of irrigation systems and rice varieties against types (number of species), populations (density) and levels of damage caused by a snail. The study was conducted at the Research Field of the Faculty of Agriculture, UMY. Snails identification was done in Plant Protection Laboratory, Faculty of Agriculture, UMY from April to August 2019. This research was arranged in a strip plot (4x3) design in a Randomized Complete Block Design using 3 blocks as replications. Factor I is the type of irrigation, consisting of 3 settings, namely conventional irrigation, intermittent irrigation or SRI with 10 days inundated 5 days dried and intermittent irrigation or SRI with 7 days inundated 3 days dried, while Factor II is plant variety, consisting of Rojolele Genjah varieties, Mentikwangi varieties, Pandanwangi varieties and Ciherang varieties. The results show that the irrigation system affected the snail population at 8 weeks after planting and the number of snail species at 4 and 10 weeks after planting. The number of snail species and population of snails in conventional irrigation is higher than that of in intermittent irrigation or SRI with 7 days inundated 3 days dried. Meanwhile, variety influences the number of snail species at 8 weeks after planting. The highest snail species number was found in Pandanwangi and Ciherang variety than other varieties. In terms of yield, Mentikwangi variety produced higher grain yielded than Rojolele variety. In general, the irrigation system did not have any interaction with rice varieties towards snail population, number of snail species, damage intensity, and grain yield per hectare.