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Peronospora destructor is a plant pathogen. It causes downy mildew on leaves of cultivated and wild Allium.Allium cepa (onion and shallot) is most often affected, while Allium schoenoprasum (chives) and Allium porrum (leek) are only occasionally affected.
Allium fistulosum, the Welsh onion, also commonly called bunching onion, long green onion, Japanese bunching onion, and spring onion, is a species of perennial plant, often considered to be a kind of scallion. The species is very similar in taste and odor to the related common onion, Allium cepa, and hybrids between the two (tree onions) exist.
The onion thrips is thought to have originated in the Mediterranean region but is now found on all continents except Antarctica. [3] It infests a wide range of host plants that include onion, leek and garlic, brassicaceous plants such as cabbage, cauliflower and broccoli, asparagus, sugarbeet, melon, pumpkin, marrow and cucumber, strawberry, potato, tobacco, cotton and many fruiting and ...
The larvae damage bulbs of onions, garlic, chives, shallots, leeks, and flowering plants. The first generation of larvae is the most harmful because it extends over a long period owing to the females' longevity and occurs when the host plants are small. Seedlings of onion and leek can be severely affected as can thinned-out onions and shallots. [3]
Thyme, nasturtiums, and onion showed good resistance to cabbage worm, weevil and cabbage looper. [28] Broccoli: Brassica oleracea: Lettuce: Beets, dill, onions, [6] tomato, [31] turnip, [32] clover [31] Broccoli as a main crop intercropped with lettuce was shown to be more profitable than either crop alone. Turnip acts as a trap crop. [32]
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The leek moth or onion leaf miner (Acrolepiopsis assectella) is a species of moth of family Acrolepiidae (formerly Glyphipterigidae) and the genus Acrolepiopsis. The species is native to Europe and Siberia , but is also found in North America , where it is an invasive species .
An onion (Allium cepa L., from Latin cepa meaning "onion"), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus Allium. The shallot is a botanical variety of the onion which was classified as a separate species until 2011.
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