By Y. Elad, B. Williamson, Paul Tudzynski, Nafiz Delen
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Extra info for Botrytis [Elektronisk resurs] : biology, pathology and control
B. allii Munn - B. anthophila Bondartsev B. C. Walker B. calthae Hennebert B. :Fr. Mating system Major Hosts - Allium Refs1 4, 7, 8, 16 4, 8, 16 - Allium ? 2 - Trifolium ? 3 - Allium - Caltha Heterothallic Polyphagous 4, 7, 8, 9 - Convallaria 8 Bt. E. Elliott Bt. fuckeliana (de Bary) Whetzel 4, 8, 12 4, 7, 8, 16 4, 6, 7, 8, 9 B. ) OndĜej B. convoluta Whetzel & Drayton B. croci Cooke & Massee Bt. convoluta (Drayton) Whetzel - - Iris 4, 7, 8, 9 - Crocus B. Botryotinia sp. Heterothallic Lilium 7, 8, 11 4, 7, 8, 13, 14 - Vicia 7, 8, 15 - Ficaria 6, 7, 8, 9 - Galanthus 4, 7, 8 - Gladiolus 4, 7, 8, 9 Homothallic Allium 1, 7, 8, 9 - Hyacinthus 4, 7, 8 B.
Although their sole function is believed to be one of spermatization, they may also help the fungus to survive adverse conditions. The unicellular structures are generally produced in chains, but Urbasch (1984a) noted that after prolonged adverse conditions, B. cinerea formed clusters of microconidia bearing phialides and then embedded aggregates of these conidia in mucilage, which is then enclosed within a protective covering (hülle). Due to protection by this covering, the enclosed microconidial aggregates survived on dry agar plates without degeneration for up to 6 months and formed new mycelia when placed on fresh media.
Because similar proportions of conidia fell as clumps from undisturbed inverted cultures as from those blown by a strong wind and because the mean numbers of conidia per clump were similar, wind appears to have little effect on clumping (Harrison and Lowe, 1987). Little is known about the deposition of airborne conidia under field conditions on different plant surfaces such as leaves, shoots and fruits. Fluorescence microscopy of leaves, berries and the inner bunch parts of grape (Coertze and Holz, 1999; Holz, 1999) and fruits of nectarine, plum and pear (Holz, 1999) dusted with dry B.