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Lettuce (Lactuca sativa) is an annual plant of the family Asteraceae mostly grown as a leaf vegetable.The leaves are most often used raw in green salads, although lettuce is also seen in other kinds of food, such as sandwiches, wraps and soups; it can also be grilled. [3]
Lactuca canadensis is a species of wild lettuce known by the common names Canada lettuce, Canada wild lettuce, and tall lettuce. [2] Its true native range is not clear, [2] but it is considered to be a native of the eastern and central parts of North America. It naturalized in the western part of the continent as well as in Eurasia. [3] [4]
Romaine or cos lettuce (Lactuca sativa L. var. longifolia) is a variety of lettuce that grows in a tall head of sturdy dark green leaves with firm ribs down their centers. Unlike most lettuces, it is tolerant of heat.
An example of lettuce bolting. In horticulture, bolting is the production of a flowering stem (or stems) on agricultural and horticultural crops before the harvesting of a crop, at a stage when a plant makes a natural attempt to produce seeds [1] and to reproduce. The flowering stems are usually vigorous extensions of existing leaf-bearing ...
Butterhead L: 1.8: very sensitive ... some scientists found that lettuce productivity was negatively affected by 10% and 15% blends of seawater, whereas chard and ...
In lettuce, butterhead varieties are mostly moderately to highly resistant to the aphid whereas crisphead varieties are susceptible. [11] If numbers of aphids are sufficiently high, chemical control can be attempted using insecticidal soaps.
There are certain tried and true methods of growing wealth over time. These include buying a home and seeing its value increase, investing in stocks and holding them for decades, and putting money ...
Lettuce mosaic virus (LMV) has a wide host range. All types of lettuce are susceptible, including Crisphead, Romaine, Butterhead, and leaf lettuces. And in nature, the virus infects members of that same family (Asteraceae), including crop plants such as lettuce, endive, escarole, as well as various weeds and wild lettuce species.
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