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Cause and Host Alternaria: Small water-soaked lesions, maturing into sunken and brown spots with or without a yellow halo. May show concentric rings with purple margins. Necrotic tissue may fall out to appear shot-holed. Leaf spot on many plants and crops. Septoria: Small brown spots, that turns light tan to white in the centre. Leaf spot on ...
Secondary or summer spores called conidia form in whitish patches on the undersides of leaves in tiny, concave fruiting bodies called acervuli. These conidia are horn-shaped and have hydrophilic outer cell walls that make them easily miscible in water. When spread during rain or by wind they can cause new leaf infections. [9]
Prolonged exposure to overspray of glyphosate will cause yellow leaves and new leaves will be small and elongated. Hormone weed sprays (e.g. 2,4-D and 2,4,5-T) may cause grotesque new growth with thin twisted leaves and distorted buds. Plants may die in severe cases.
The flower has six yellow tepals which may be hairy, especially on the undersides. The undersides may also be whitish or tinged green or red. Occasional flowers have 4 or 8 tepals. The fruit is a capsule with a few to many small, oily seeds. [2] [4] [5] The seeds are needed to identify many species.
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The bird flu outbreak has taken concerning turns, with more than 60 human cases confirmed. Experts outlined four signs that the virus is going in the wrong direction.
Clathrus ruber is a species of fungus in the family Phallaceae, and the type species of the genus Clathrus.It is commonly known as the latticed stinkhorn, the basket stinkhorn, or the red cage, alluding to the striking fruit bodies that are shaped somewhat like a round or oval hollow sphere with interlaced or latticed branches.
Too much moisture is what causes leafy greens to turn soft and rot. Here are four ways to keep moisture at a minimum: Buy only fresh greens. If you can easily see rotten and slimy pieces, choose ...