Disease Index for the Rust Puccinia psidii on Rose Apple in ... - ctahr
Disease Index for the Rust Puccinia psidii on Rose Apple in ... - ctahr
Disease Index for the Rust Puccinia psidii on Rose Apple in ... - ctahr
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Category 2<br />
• More than 10 spots per leaf.<br />
• Leaf spots may merge, caus<strong>in</strong>g <str<strong>on</strong>g>for</str<strong>on</strong>g>mati<strong>on</strong> of<br />
larger necrotic areas that are 25 mm (1 <strong>in</strong>ch) or<br />
more l<strong>on</strong>g.<br />
• Ured<strong>in</strong>iospores are few, and teliospores may be<br />
present.<br />
• Shot-holes, created by <str<strong>on</strong>g>the</str<strong>on</strong>g> loss of <str<strong>on</strong>g>the</str<strong>on</strong>g> diseased<br />
tissue, may also be present.<br />
As <strong>in</strong> Category 1, this level of spott<strong>in</strong>g may reflect<br />
a low <strong>in</strong>oculum level, low envir<strong>on</strong>mental humidity,<br />
or host resistance due to leaf maturity at <str<strong>on</strong>g>the</str<strong>on</strong>g> time<br />
<str<strong>on</strong>g>the</str<strong>on</strong>g> leaves were <strong>in</strong>fected.<br />
6<br />
Close-up of leaf spot and<br />
empty pustules<br />
Abaxial Abaxial Adaxial