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Allium schubertii, which has various common names including ornamental onion, flowering onion, tumbleweed onion and Persian onion, is a species of monocotyledonous flowering plant. It belongs to the onion and garlic genus, in the subfamily Allioideae of the family Amaryllidaceae. It occurs in the Levant and Libya.
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]
Allium flavum (yellow) and Allium carinatum (purple). Allium is a large genus of monocotyledonous flowering plants with around 1000 accepted species, [4] [5] making Allium the largest genus in the family Amaryllidaceae and amongst the largest plant genera in the world. [6]
Onion bulb begins to elongate 53: 503: 30% of the expected length of flower stem reached 55: 505: Flower stem at full length; sheath closed 57: 507: Sheath burst open 59: 509: First flower petals visible; flowers still closed 6: Flowering 60: 600: First flowers open (sporadically) 61: 601: Beginning of flowering: 10% of flowers open 62: 602: 20 ...
Additionally crops such as sugar beet, spinach and onions are self-pollinating and do not require insects. [35] Nonetheless, an estimated 87.5% of the world's flowering plant species are animal-pollinated, [ 36 ] and 60% of crop plant species [ 37 ] use animal pollinators.
Symptoms will often appear overnight, affecting many types of plants. Leaves and stems may turn black, and buds and flowers may be discoloured, and frosted blooms may not produce fruit. Many annual plants, or plants grown in frost free areas, can suffer from damage when the air temperature drops below 40 degrees Fahrenheit (4 degrees Celsius).
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Isolates with complete HC-Pro sequences were non-persistently transmitted by aphids on their own, while the isolates with short HC-Pros (OYDV-S) were only aphid transmissible when they were co-infected with leek yellow stripe virus (LYSV), another potyvirus that mostly infects Allium spp. LYSV HC-Pro was assumed to interlink both LYSV and OYDV-S with the aphid stylet. [9]