Busuk akar

Class: Jamur
Common Name: Busuk akar
Scientific Name: Rhizoctonia spp
Potential Host:

Eggplant, strawberry, pepper, tomato, basil, tarragon, mint, cabbage, cauliflower, pea, beans, soy, lettuce, cucumber, squash, melon, pumpkin, zucchini, watermelon, potato, carrot, beet, rice, sage, cucumber, radish, cotton, canola, wheat, barley, peanuts, corn, strawberry, turf grass, and tobacco

Who Am I?

Rhizoctonia is a common seed-and soil-borne fungus with significant saprophytic characteristics (feeds on dead organic matter). Rhizoctonia causes “damping-off” in cultivated fields, ornamental plants, and turf grass. The pathogen overwinters on plant residue and soil.

Several types of rhizoctonia attack plants and are known by their non-host specialization; in other words, they can affect many types of plants. One such specie is rhizoctonia solani, which is the causal agent of black scurf of potatoes, violet root rot in carrots, bare patch of cereals, root rot of sugar beet, belly rot of cucumber, and sheath blight of rice.

Rhizoctonia favors high humidity conditions and can develop in a broad-spectrum of temperatures: 10-32c. Rhizoctonia tends to occur within the short time frame adjacent to planting; the fungi attacks plants at the soil line. Easy to spot symptoms of Rhizoctonia are “damping off” and reduced seed germination. Infected seedlings exhibit red to brown lesions primarily at the stem base. Red-brown to black lesions will form on roots. With time, infected seedlings will wilt, while older, more mature plants will exhibit an increased tolerance to the disease.

Control Measures

Tanaman atau bibit yang tahan terhadap penyakit merupakan syarat penting dalam budidaya.

Untuk mengurangi terjadinya infeksi pada pertumbuhan tanaman diperlukan beberapa teknik dan cara.

Jarak tanam sangat penting dalam budidaya, tanaman harus terhindar dari kerapatan yang tinggi dengan tujuan sebaran cahaya dapat terserap sempurna keseluruh bagian tanaman. Jika kerapatan tanaman tinggi menyebabkan daun dan buah-buah cepat kering pada saat kelembaban udara tinggi.

Bagian tanaman yang rusak tidak diperbolehkan berada disekitar area penanaman, hal ini akan mempermudah sebaran hama dan penyakit. Begituhalnya dengan sterilisasi dari alat-alat pertanian yang telah terinfeksi penyakit harus di hindarkan ke area penanaman terutama area yang basah.

Jika jaringan tanaman tertutup dan tidak terluka, memperpendek durasi musim basah dengan mempercepat pengeringan daun dikarenakan sirkulasi udara yang baik dan kondisi lingkungan yang bersih.

Drainase tanah sangat penting dikarenakan jika terdapat genangan air akan meningkatkan sebaran penyakit.

Untuk menjaga kelembaban tanah terdapat beberapa teknik salah satunya menggunakan polyethylene untuk mengurangi penguapan dalam tanam.

carbendazim, propiconazole, pencycuron, iprodione, dan fludioxonil.

Trichoderma harzianum ialah jamur yang digunakan sebagai fungisida dalam mengendalikan rhizoctonia

*Names marked in red are considered to be highly poisonous to beneficial insects.

*Names marked in green are considered to be organic and IPM (integrated pest management) compatible.

Caution and careful notice should be taken when using any plant protection products (insecticides, fungicides, and herbicides). It is the grower’s sole responsibility to keep track of the legal uses and permissions with respect to the laws in their country and destination markets. Always read the instructions written on labels, and in a case of contradiction, work in accordance to the product label. Keep in mind that information written on the label usually applies to local markets. Pest control products intended for organic farming are generally considered to be less effective in comparison to conventional products. When dealing with organic, biologic, and to some extent a small number of conventional chemical products, a complete eradication of a pest or disease will often require several iterations of a specific treatment or combination of treatments.

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