Abstract
Anggraini et al, 2018. Host-Range Analysis of Downy Mildew (Pseudoperonospora cubensis) and Anthracnose (Colletotrichum Sp.) on some Cucurbitaceae Plants. JLSO 7(2): Inhibiting factors of cucumber cultivation is Downy mildew disease that is caused by Pseudoperonospora cubensis and Anthracnose by Colletotrichum sp. The objective of this research was to observe pathogenicity of activity caused by Pseudoperonospora cubensis and Colletotrichum sp. isolated from cucumber towards Cucurbitaceae plants. The research was conducted at greenhouse and Phytopathology Laboratory, Department of Plant Pests and Diseases Faculty of Agriculture, University of Sriwijaya in September to December 2016. This study used Randomized Block Design (RBD), with four types of plants, 2 treatments and 4 replications. The results showed that the incubation period of the plant inoculation Downy mildew by Pseudoperonospora cubensis range between 4.5-5.0 days. Result of broadest spot area was on melon leaf 2.05 cm2 with the chlorophyll content of 0.4928 mg/g and the lowest result was on cucumber leaf 0.90 cm with the chlorophyll content of 0.7628 mg/g. While the results showed that the incubation period of the applied plant pathogen Colletotrichum sp. ranging from 3.0-4.5 days. Result of broadest spot area was on melon leaf 4.00 cm2 with the chlorophyll content of 0.3932 mg/g and the lowest result was on cucumber leaf 2.42 cm2 with the chlorophyll content of 0.7588 mg/g.
Highlights
Faktor penghambat dalam budidaya timun suri yaitu serangan penyakit Downy mildew yang disebabkan oleh Pseudoperonospora cubensis dan Antraknosa oleh Colletotrichum sp
Inhibiting factors of cucumber cultivation is Downy mildew disease that is caused by Pseudoperonospora cubensis and Anthracnose by Colletotrichum sp
The results showed that the incubation period of the plant inoculation Downy mildew by Pseudoperonospora cubensis range between 4.5-5.0 days
Summary
Hal itu terjadi karena proses fotosintesis pada tanaman terganggu oleh sel-selnya yang mengalami nekrosis akibat terinfeksi oleh jamur tersebut. Penelitian bertujuan untuk mengamati tingkat patogenesitas dan kisaran inang patogen Pseudoperonospora cubensis penyebab penyakit Downy mildew dan Colletotrichum sp. Penyebab penyakit Antraknosa pada beberapa tanaman cucurbitaceae yang sering dibudidayakan di Indralaya Penelitian bertujuan untuk mengamati tingkat patogenesitas dan kisaran inang patogen Pseudoperonospora cubensis penyebab penyakit Downy mildew dan Colletotrichum sp. penyebab penyakit Antraknosa pada beberapa tanaman cucurbitaceae yang sering dibudidayakan di Indralaya
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