In this article we will discuss about the transmission of disease by vectors. There are three different kinds of transmission for the spread of various diseases: (a) Direct transmission: In this case the transmission of disease is occurred through close contact i.e. transferred from man to man through close contact, e.g., scabies. (b) Mechanical transmission: In this method, the disease-agent [...]
The article throws light upon the five major diseases found in marigold. The diseases are: 1. Damping off 2. Leaf Spots and Blight 3. Inflorescence Blight 4. Flower Bud Rot 5. Powdery Mildew. Disease # 1. Damping off: It is caused by Rhizoctonia solani and appears as brown necrotic spots, girdling the radicle which later on extends to plumule and [...]
This article throws light upon the four major diseases found in tulip. The diseases are: 1. Important Disease of Tulip 2. Botrytis Tulipae 3. Virus (Tulip Breaking Mosaic) 4. Zephyranthes sp. (Amaryllidaceae). Disease # 1. Important Disease of Tulip: Bulb crown and Root rot (fungi—Penicillium sp., Sclerotium rolfsii; Pythium sp., Fusarium sp., Rhizopus stolonifera, Rhizoctonia solani, Aspergillus sp.). There are [...]