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Cnidoscolus stimulosus, the bull nettle, [1] spurge nettle, stinging nettle, tread-softly or finger rot, is a perennial herb covered with stinging hairs, native to southeastern North America. A member of the family Euphorbiaceae (spurge family), it is not a true nettle .
Urtica dioica, often known as common nettle, burn nettle, stinging nettle (although not all plants of this species sting) or nettle leaf, or just a nettle or stinger, is a herbaceous perennial flowering plant in the family Urticaceae. Originally native to Europe, much of temperate Asia and western North Africa, [2] it is now found worldwide.
Stems will vary in between being smooth and covered in stiff hairs (glabrous to strigose), but have few of the stinging hairs the plant is known for. [ 4 ] The leaves of Urtica gracilis are variable, elliptic , lanceolate , or ovate , and 6–20 cm long by 2–13 cm across, with a base that can either be rounded or shaped like a heart ( rounded ...
Mowing weakens stinging nettle by decreasing leaf mass and limiting root growth. It also eliminates spread by seed. Mowing is an effective method for controlling stinging nettle growing in ...
Many species have stinging hairs and may be called nettles or stinging nettles (the latter name applying particularly to U. dioica). The generic name Urtica derives from the Latin for 'sting'. Due to the stinging hairs, Urtica are rarely eaten by herbivores , but provide shelter for insects.
Since leaf beetles produce high concentrations of 3-NPA esters, a powerful chemical defense against a wide range of different predators is obvious. The larvae of Chrysomelina leaf beetles developed a second defensive strategy that is based on the excretion of droplets via pairs of defensive glands at the back of the insects.
Tortoiseshell butterflies tend to be unpalatable to birds. If a bird sees this bright red colouring, then they will be less likely to eat the butterfly. [14] The tortoiseshell butterfly is particularly fast. When discovered and attacked by a predator the tortoiseshell butterfly will fly away in a straight line in order to outstrip the predator ...
Bird control or bird abatement involves the methods to eliminate or deter pest birds from landing, roosting and nesting. Bird control is important because pest birds can create health-related problems through their feces, including histoplasmosis, cryptococcosis, and psittacosis. [1] Bird droppings may also cause damage to property and equipment.