Rust Diseases of Willow and Poplar by Ming Hao Pei, Alistair R. McCracken

By Ming Hao Pei, Alistair R. McCracken

In recent times, there was elevated curiosity in starting to be willow and poplar bushes, as fast-growing species that experience a number of reasons, together with use as biofuels for power creation. although, silviculture of those bushes has been restricted by way of illnesses equivalent to Melampsora rusts. This e-book offers a entire assessment of over twenty years of intensive learn of the rust illnesses affecting willow and poplar. It offers insights into the inhabitants biology of Melampsora rusts in Europe, China, India and Chile, the genetics in their resistance, and their interplay with their hosts. The ebook deals info necessary to the advance of potent and sustainable ailment regulate measures together with using willow genotype combinations and organic regulate brokers.

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Comb. nov. Urediniospores: 25–38 × 12–16 mm Teliospores: 25–46 × 8–16 mm Telia sub-epidermal 1. Urediniospores one type 1. Urediniospores two types 2. Urediniospores apically smooth 2. Urediniospores evenly echinulate 2 M. dimorphospora Kaneko & Hirat. 3 4 3. Urediniospores apically thick Urediniospores: 26–44 × 12–16 mm Teliospores: 19–30 × 9–12 mm 3. Urediniospores apically not thickened Urediniospores: 20–36 × 11–17 mm Teliospores: 25–45 × 7–10 mm M. larici-pentandrae Kleb. 4. Urediniospores apically thickened Urediniospores: 15–27 × 13–17 mm Teliospores: 35–70 × 8–16 mm 4.

Urediniospore wall thickness up to 3 mm 7. 5 mm Urediniospores: 13–28 × 15–18 mm Teliospores: 34–42 × 8–15 mm 7 8 M. salicis-warburgii Sawada. 8. Teliospores length up to 40 mm M. paradoxa Diet & Holw. 8A Urediniospores: 15–26 × 15–21 mm M. paradoxa Diet & Holw. 5–2 mm] M. salicis-cupularis 8B Teliospores: 28–39 × 11–14 mm 8. Teliospores length up to 50 mm M. ) Thum. 32 G. Bagyanarayana A collective species having nine formae speciales on different aecial hosts Urediniospores: 2–25 × 10–19 mm Teliospores: 20–50 × 7–15 mm Aecia on Saxifraga Urediniospore wall 2 mm thick M.

In Britain, the autoecious M. H. Pei, unpublished observations). For willow rusts, the ability to infect willow buds/ stems is essential to overwintering as the uredinial stage. Host Specificity in Willow Rusts Historical studies Melampsora rusts are specialized in their pathogenicity, and their telial host range can be useful in distinguishing different Melampsora species. At sub-species level, the host range provides the basis for the identification of formae speciales or pathotypes (races). The host range of willow rusts is determined by inoculations of willows with urediniospores or aeciospores.

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