[The biological features of oak mealy dew activator Microsphaera alphitoides Griff. et Maubl]
Fedorov, N.I. | Khvasko, A.V.(Belarus State Technological Univ., Minsk (Belarus))
It is established, that duration conidium stages of the Belarus population of activator Microsphaera alphitoides Griff. et Maubl depends on terms of primary infection and can proceed from June till September. The optimum temperature of air for formation and distributions conidium is equal 16-20 deg C, humidity 77-87%. Dispersion konidy is carried out by means of a wind. Range of scattering reaches 75-80 m. Fruit bodies (klejstotetsii) are formed in the end of the vegetative period at daily average. Fruit bodies (klejstotetsii) are formed in the end of the vegetative period at daily average temperature of air 10-16 deg C and humidity of 75-90 %. During the winter period patogen it is kept exclusively due to ascomycetous stages. And in process of destruction mycelium (September-October) klejstotetsii are showered on ground. Maturing of fruit bodies occurs in May-first to half of June, sumkospory infect leaves of the first gain on which the infection collects, providing epiphyte development of illness on leaves
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