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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 […]

Agricultural Study Materials Insects

Pest – Definition of Pest – Categories of Pests – Causes of Pest outbreak – Study Guide

PEST – Derived from French word ‘Peste’ and Latin term ‘Pestis’ meaning plague or contagious disease Pest is any animal which is noxious, destructive or troublesome to man or his interests A pest is any organism which occurs in large numbers and conflict with man’s welfare, convenience and profit A pest is an organism which […]

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 […]