Agri Diseases

DISEASES OF CASTOR – Agricultural study materials

DISEASES CAUSAL ORGANISM Seedling blight Phytophthora parasitica Rust Melampsora ricini Leaf blight Alternaria ricini Brown leaf spot Cercospora ricinicola Bacterial leaf blight Xanthomonas campestris pv. ricini 1. SEDLING BLIGHT – Phytophthora parasitica Symptoms The disease appears as circular, dull green patch on both the surface of the cotyledonary leaves. Later it spreads and cause rotting. […]

Agri Diseases

Disease of Oats plants – Agricultural study materials

Diseases of oats DISEASES CAUSAL ORGANISM Septoria avenae blotch    Phaeosphaeria avenaria f.sp. avenaria Stem and leaf rust            Puccinia graminis var. avena Leaf spot Drechslera campanulata Bacterial blight Pseudomonas syringae pv.striafaciens Yellow dwarf      Barley yellow dwarf virus 1. Septoria avenae blotch   — Phaeosphaeria avenaria f.sp. avenaria Symptoms The fungus infects leaves, sheaths and stem and […]

Insects

PESTS OF MEDICINAL AND AROMATIC PLANTS – Free Study Material

BELLADONA Cut worm, Agrotis flammetra (Noctuidae: Lepidoptera)  Leaf feeder, Archipsinca ceana SENNA Green leaf eating caterpillar, Catopsilia pyranthe Pierdae Lepidoptera Pod borer, Etiella zinckenella Phycitidae Lepidoptera  LONG PEPPER Mealy bug, Dysmicoccus sp. (Pseudococcidae: Hemiptera)  Tea mosquito bug, Helopeltis theivora (Miridae: Hemiptera)  MEDICINAL YAMS Aphids, Aphids gossypii, Pentalonia nigronervosa (Aphididae: Hemiptera)  Red spider mite, Tetranychus sp […]

Agricultural Study Materials Insects

Mulberry silkworm –races and their characters – Mulberry plantation studies

Voltinism is a term used in biology to indicate the number of broods or generations of an organism in a year. or Number of generations per year under natural environmental conditions. Based on voltinism, Bombyx mori is divided in to 3 types, namely   i) Univoltines, ii) Bivoltines  and iii. Multivoltines. i) UNIVOLTINE RACES:  They produce […]

Agricultural Study Materials

Sericulture – Mulberry cultivation- Mulberry Yield – Agricultural Study material

Mulberry cultivation Mulberry is a fast growing deciduous tree occurring in sub tropical and temperate climate.  Mulberry has characteristic long idioblast cells in the upper epidermis of leaves. Inflorescence is a catkin / spike with unisexual flowers. Hence it is a cross pollinated crop.  The important species of mulberry cultivated in India are , a) […]