Distribution Area of Ditylenchus spp. on Garlic in Central Java and East Java Miftahul Ajri, Siwi Indarti
Plant Pest Science Study Program, Faculty of Agriculture, Universitas Gadjah Mada
Abstract
Ditylenchus dipsaci (stem and bulb nematode) can attack garlic and cause distortion and yellowing of leaves and necrosis or rotting of bulbs. The existence of D. dipsaci was first reported in Temanggung, Central Java in 2018. This study aims to determine the distribution area of Ditylenchus spp. on garlic crops in Central and East Java. Samples of garlic crops were taken by purposive sampling method. Nematodes were extracted from bulbs and roots by water immersion method. Ditylenchus sp. found in the center of garlic crops in Magelang, Temanggung, Karanganyar, Tegal and Brebes (Central Java) and Mojokerto and Malang (East Java). The highest population of Ditylenchus sp. was found in Kaliangkrik, Magelang, Central Java (52,53 nematodes/5 gr bulbs) and Poncokusumo, Malang, East Java (45,73 nematodes/5 gr bulbs). The infested varieties of garlic were Lumbu Kuning, Lumbu Hijau, Tawangmangu Baru dan Sangga Sembalun. Lumbu Kuning was the variety with the highest nematode population (24,30 nematodes/5 gr bulbs). Ditylenchus sp. was not found in Tawangmangu Baru and Lumbu Kuning varieties in Karanganyar, but was found in the same variety in Magelang and Tegal. Based on the specific symptoms, morphological and morphometric characters, the nematode species found that infects garlic is Ditylenchus dipsaci.
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