Search results
Results From The WOW.Com Content Network
Shot hole disease is a major concern of the stone fruit industry. It is estimated that 80% of the California almond crop may be infested with shot hole disease, resulting in a potential yield loss of 50-75%. [3] In the 1930s, it was found that applications of Bordeaux mixture reduces shot hole disease on peaches from 80% to 9%.
A. brassicae and A. brassicicola cause very similar symptoms, with symptoms normally occurring on older leaves, as they are closer to the soil and more likely to be affected by rain splash, which spreads the pathogen. [6] Necrotic lesions bordered by chlorotic halos develop on the leaf surface.
Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
Petunia is a genus of 20 species of flowering plants of South American origin. [1] The popular flower of the same name derived its epithet from the French, which took the word pétun, 'tobacco', from a Tupi–Guarani language. A tender perennial, most of the varieties seen in gardens are hybrids (Petunia × atkinsiana, also known as Petunia × ...
Bacterial diseases; Bacterial blight Pseudomonas syringae pv.aptata: Bacterial pocket Xanthomonas beticola: Bacterial soft rot: Erwinia carotovora subsp. carotovora: Bacterial vascular necrosis and rot
Phytophthora cryptogea P. cryptogea colony on potato dextrose agar Scientific classification Domain: Eukaryota Clade: Diaphoretickes Clade: SAR Clade: Stramenopiles Phylum: Oomycota Order: Peronosporales Family: Peronosporaceae Genus: Phytophthora Species: P. cryptogea Binomial name Phytophthora cryptogea Pethybr. & Laff., (1919) Phytophthora cryptogea is a species of water mould in the family ...
Perforate leaves, sometimes called fenestrate, occur naturally in some species of plants. Holes develop as a leaf grows. Holes develop as a leaf grows. The size, shape, and quantity of holes in each leaf can vary greatly depending on the species and can even vary greatly within a given species.
Ruellia caroliniensis, the Carolina wild petunia, is a wild petunia of the family Acanthaceae native to the southeastern United States. [1] It's native range spans the eastern coast with the northernmost extent reaching New Jersey [ 2 ]