DISEASES CAUSAL ORGANISM Red rot Colletotrichum falcatum Whip smut Ustilago scitaminea Sett rot or pine apple disease Ceratocystis paradoxa Rust Puccinia erianthi Gummosis Xanthomonas campestris pv. vasculorum Mosaic Sugarcane mosaic virus Grassy shoot Mycoplasma like organism [MLO] Iron chlorosis Iron deficiency Ratoon stunting Clavibacter xyli Witch weed Striga angustifolia [Partial root parasite] 1. RED ROT […]
Tag: Agri diseases
DISEASES OF COTTON – Agricultural study materials
DISEASES CAUSAL ORGANISM Fusarium Wilt Fusarium oxysporium f.sp.vasinfectum Verticilium Wilt Verticillium dahliae Grey mildew or Areolate mildew Ramularia areola Root rot Rhizoctonia bataticola Anthracnose Colletotrichum capsici and Glomerella gossipii Leaf blight Alternaria macrospora Boll rot -Complex disease F.monoliforme, C.capsici, A.flavus, A.niger Stenosis or Small leaf Phytoplasma (Mycoplasma like organism) Bacterial blight Xanthomonas campestris pv. malvacearum […]
DISEASES OF LINSEED – Agricultural study materials
DISEASES CAUSAL ORGANISM Rust Melamspora lini Wilt Fusarium oxysporum f.sp. lini Powdery mildew Oidium lini Alternaria leaf spot Alternaria lini Septoria leaf spot Mycosphaerella linorum 1. Rust –Melamspora lini Symptoms The rust may attack all the aerial parts of the plant including the capsules. Diseased plants produce bright orange uredo pustules on both surfaces of […]
DISEASES OF SAFFLOWER – Agricultural study materials
Rust Puccinia carthami Leaf spot Cercospora carthami Leaf blight Alternaria carthami 1. RUST- Puccinia carthami Symptoms The pustules (uredosori) are chestnut brown in colour and scattered throughout the leaves. Later, black teliosori are formed on the leaves. Stem girdling occurs in older plants and rust pustules also appear on roots. Uredia and telia are produced […]
DISEASES OF SUNFLOWER – Agricultural study materials
DISEASES CAUSAL ORGANISM Rust Puccinia helianthi Leaf blight Alternaria helianthi Root rot or charcoal rot Macrophomina phaseolina Head rot Rhizopus nigricans 1. RUST – Puccinia helianthi Symptoms Small, reddish brown pustules (uredia) covered with rusty dust appear on the lower surface of bottom leaves. In severe infection, numerous pustules appear on leaves leading to yellowing […]
DISEASES OF GINGELLY OR SESAME – Agricultural study materials
DISEASES CAUSAL ORGANISM Leaf blight Alternaria sesami Leaf spot or white spot Cercospora sesami Leaf and stem blight Phytophthora parasitica var sesami Root rot or charcoal rot Macrophomina phaseolina Wilt Fusarium oxysporium f.sp.sesami Powdery mildew Erisiphe cichoracearum Bacterial blight Xanthomonas campestris pv.sesami Bacterial leaf spot Pseudomonas sesami Leaf curl Nicotiana virus Phyllody Mycoplasma – like […]
DISEASES OF MUSTARD / RAPE SEED – Agricultural study material
White rust Albugo cruciferarum Leaf blight Alternaria brassicae 1. WHITE RUST / BLISTER- Albugo cruciferarum Symptoms Isolated, raised and shiny white pustules develop on leaves and stem. In severe cases, the entire plant may remain dwarf and only small leaves are formed. The pathogen is an obligate parasite. Mode of spread and survival The infection […]
DISEASES OF BLACK GRAM / GREEN GRAM, SOYBEANS, COW PEA
1. LEAF CURL – Tomato spotted wilt virus [TSWV] Symptoms The infection starts as chlorosis of lateral veins near the leaf margins and margins slowly curl downwards. The infected leaves are brittle and plants produce a few small and malformed pods. Vector The disease is transmitted by Thrips viz., – Frankliniella schultzi, Thrips tabaci and […]
DISEASES OF BENGAL GRAM / CHICK PEA – Free Study Material
1. WILT – Fusarium oxysporum f.sp. ciceri Symptoms The disease occurs in seedling stage and flowering stage. Infected seedlings show yellowing, drying of leaves, browning of vascular bundles and finally wilting of plants. Mode of Spread and Survival The disease spreads through irrigation water and farm implements. The pathogen survives as chlamydospores in the soil […]
DISEASES OF RED GRAM / PIEGON PEA – Agricultural study materials
1. WILT – Fusarium oxysporum f.sp. udum Symptoms The characteristic symptoms of the diseases are yellowing and dropping of leaves followed by drying of the plant and dark – streaks under the bark of roots and base of the stem. The vascular tissues exhibit brown discolouration and partial wilting of roots. The symptoms appear when […]
Diseases Of Sorghum Plant – Agricultural study material
DISEASES OF SORGHUM DISEASES CAUSAL ORGANISM Charcoal rot Macrophomina phaseolina Downy mildew / leaf shredding Perenosclerospora sorghi Rust Puccinia purpurea Grain smut / kernal smut / covered smut Sporisorium sorghi Loose smut Sporisorium cruenta Long smut Tolyposporium ehrenbergii Head smut Sporisorium reiliana Ergot / sugary disease Claviceps sorghi Leaf blight Helminthosporium turcicum Rectangular leaf spot […]
Diseases Of Maize Plant – Study material
DISEASES OF MAIZE DISEASES CAUSAL ORGANISM Downey mildew / Crazy top Peronosclerospora sorghi, P.philipenensis Charcoal rot Macrophomina phaseolina Head smut Sphacelotheca reiliana Leaf blight Helminthosporium maydis Rust Puccinia sorghi 1. DOWNY MILDEW OR CRAZY TOP- Peronosclerospora sorgi Symptoms The development of chlorotic streaks appears on the leaves and plants exhibit stunted and bushy appearance. White […]
Disease of Barley Plant – Agricultural study materials
DISEASES OF BARLEY DISEASES CAUSAL ORGANISM Leaf rust Puccinia hordei Stem rust Puccinia graminis f.sp. secalis Stripe rust Puccinia striiformis Covered smut Ustilago hordei Loose smut Ustilago nuda Powdery mildew Erysiphe graminis f.sp. hordei Bacterial leaf blight Pseudomonas syringae pv. Syringae Barley stripe mosaic Barley stripe mosaic virus (BSMV) 1. Stem rust — Puccinia graminis […]
Diseases of Wheat – Free Online Studymaterial
DISEASES OF WHEAT DISEASES CAUSAL ORGANISM Black / Stem rust Puccinia graminis tritici Leaf / brown / orange rust Puccinia recondita Yellow / stripe rust Puccinia striiformis Loose smut Ustilago nuda tritici Flag smut Urocystis agropyri Rough spore bunt / stinking bunt Tilletia caries Smooth spored bunt Tilletia foetida Kernal bunt Neovassia indica Powdery mildew […]
DISEASES OF RICE – Fungal, Bactorial and virus diseases – Online Studymaterial
Important diseases of rice DISEASES CAUSAL ORGANISM FUNGAL DISEASES Blast Pyricularia oryzae Brown spot or Sesame leaf spot Bipolaris oryzae (Helminthosporium oryzae) Sheath blight Rhizoctonia solani Sheath rot Sarocladium oryzae Narrow brown leaf spot Cercospora janseana Stem rot Sclerotium oryzae Foot rot or Bakanae disease Fusarium moniliforme False smut Ustilaginoidea virens Udbatta disease Ephelis oryzae […]