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All parts of these plants are toxic, due to the presence of alkaloids. Grazing animals, such as sheep and cattle, may be affected and human fatalities have occurred. [106] Delphinium spp. larkspur Ranunculaceae: Contains the alkaloid delsoline. Young plants and seeds are poisonous, causing nausea, muscle twitches, paralysis, and often death.
Dermanyssus gallinae (also known as the red mite) is a haematophagous ectoparasite of poultry.It has been implicated as a vector of several major pathogenic diseases. [1] [2] Despite its common names, it has a wide range of hosts including several species of wild birds and mammals, including humans, where the condition it causes is called gamasoidosis.
The combination of grass and centro is more suppressive of weeds than any other grass and legume combination. [10] Insects are the biggest problem for centro plants. Pests include meloidae beetles, thrips, red spiders, bean flies and caterpillars. [10] Centro is mostly unaffected by diseases, and tends not to have any major attacks [6].
List of papaya diseases; List of pea diseases; List of peach and nectarine diseases; List of peanut diseases; List of pear diseases; List of pearl millet diseases; List of pecan diseases; List of pepper diseases; List of Persian violet diseases; List of pigeonpea diseases; List of pineapple diseases; List of foliage plant diseases (Piperaceae ...
A noxious weed, harmful weed or injurious weed is a weed that has been designated by an agricultural or other governing authority as a plant that is harmful to agricultural or horticultural crops, natural habitats or ecosystems, or humans or livestock. Most noxious weeds have been introduced into an ecosystem by ignorance, mismanagement, or ...
Often, weeds are simply those native plants that are adapted to grow in disturbed ground, the disturbance caused by ploughing and cultivation favouring them over other species. Any plant is a weed if it appears in a location where it is unwanted; Bermuda grass makes a good lawn plant under hot dry conditions but become a bad weed when it out ...
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Lactuca serriola is the wild progenitor of cultivated lettuce (Lactuca sativa) and can be affected by lettuce downy mildew, one of the most serious diseases of lettuce. [12] L. serriola has shown resistance to the plant pathogen Bremia lactucae , the cause of the disease. [ 12 ]