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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%.
This article is a list of diseases of beets (Beta vulgaris), a plant grown for its edible taproot and leaves. Bacterial diseases. Bacterial diseases;
The genera Brunfelsia, Plowmania, Fabiana, Nierembergia and Petunia furnish garden plants bearing attractive flowers.Brunfelsia and Plowmania are genera of tropical shrubs requiring glasshouse protection in temperate climate areas; Fabiana species are hardy shrubs; Nierembergia species are dwarf, hardy herbaceous perennials or sub-shrubs, and Petunia × atkinsiana has yielded a huge variety of ...
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]
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.
After pollination, a seed capsule forms at the leaf axil where the flower originated. [6] The seeds of Ruellia caroliniensis are dispersed through explosive dehiscence.When the seed capsules of the plant reach maturity (after about two months), they burst open propelling the seeds away from the parent plant.
Its leaves are oppositely arranged, around 2.5 inches long by 1 inch wide, and are light green to medium green with entire margins. The stems and leaves are covered with soft white hairs. The funnel-shaped 5-lobed flowers are about 1.5 to 2.5 inches in diameter and resemble petunias, as does the rest of the plant.
While boron may be sprayed on leaves, excess will cause plant damage. Application of boron may not correct boron deficiency in alkaline soils because even with the addition of boron, it may remain unavailable for plant absorption. [5] [6] Continued application of boron may be necessary in soils that are susceptible to leaching such as sandy ...