In this article we will discuss about:- 1. Introduction to Phytophthora Infestans 2. Vegetative Structure of Phytophthora Infestans 3. Reproduction. Introduction to Phytophthora Infestans: The most important species is Phytophthora infestans, which causes late blight disease of potato by which the Ireland famine took place in 1845. The pathogen is most destructive in low temperature and high humidity. Some other [...]
In this article we will discuss about:- 1. Introduction to Pythium 2. Vegetative Structure of Pythium 3. Reproduction. Introduction to Pythium: The genus Pythium (Gr. pythein — to cause to rot) is represented by 92 species, of which 28 species are reported from India. Several species of Pythium grow as saprophytes in soil, in water; on decaying matters, but some [...]
In this article we will discuss about the reproduction in Ascobolus. Asexual Reproduction in Ascobolus: It reproduces asexually by oidia (arthospore) or papulospore formation: Oidia (arthospores). Species like A. stercorarius, A. denudantus etc., produce oidia in chains on the vegetative mycelium (Fig. 4.45A) derived from an ascospore. These oidia on germination produce new mycelium, which again may develop into new [...]