In this article we will discuss about the asexual and sexual reproductive structure of phytophthora. Asexual Reproduction of Phytophthora: 1. Asexual reproduction takes place by conidiosporangia developed on branched conidiophores or sporangiophores. 2. Sporangiophores are the branched hyphae which come out through the stomata of the host leaf. 3. At the tip of the branches of sporangiophores develop sporangia (Fig. [...]
In this article we will discuss about the structure of asexual and sexual reproductive structure of peziza. Asexual Reproduction of Peziza: 1. Asexual reproduction takes place by conidia and chlamydospores. 2. The conidia are formed exogenously at the tip of conidiophores. 3. Conidia germinate to form the new mycelium. 4. Some intercalary, thick-walled cells are formed in the mycelium. These [...]
In this article we will discuss about the symptoms of the diseases phytophthora on potato and colocasia. i. Symptoms of Phytophthora on Potato: 1. "Late-blight of potato" (Solanum tuberosum) appears in the fields only after blossoming period. 2. First symptom is the appearance of many small, black or purplish-black areas (Fig. 63) on the leaves. 3. These black patches then [...]