Search results
Results from the WOW.Com Content Network
Pentas lanceolata, commonly known as Egyptian starcluster, [3] is a species of flowering plant in the madder family, Rubiaceae that is native to tropical Africa from Sudan to Democratic Republic of the Congo and Mozambique, as well as Saudi Arabia and Yemen on the Arabian Peninsula. [2]
Download as PDF; Printable version; ... Pages in category "Pentas" ... Pentas lanceolata This page was last edited on 1 September 2014, at 19:29 (UTC). ...
Pentas is a genus of flowering plants in the family Rubiaceae.The genus is found in tropical and southern Africa, the Comoros, Madagascar, and the Arabian Peninsula. [1]The plants have hairy green leaves and clusters of flowers in shades of red, white, pink, and purple.
Organisms that cause infectious disease include fungi, oomycetes, bacteria, viruses, viroids, virus-like organisms, phytoplasmas, protozoa, nematodes and parasitic plants. [2] Not included are ectoparasites like insects , mites , vertebrates , or other pests that affect plant health by eating plant tissues and causing injury that may admit ...
Insects that pose disadvantages are considered pests. Some species can cause indirect damage by spreading diseases, and these are termed as disease vectors. Those that are beneficial include those that are reared for food such as honey, substances such as lac or pigments, and for their role in pollinating crops and controlling pests. [1]
For example, the human body louse transmits the bacterium Rickettsia prowazekii which causes epidemic typhus. Although invertebrate-transmitted diseases pose a particular threat on the continents of Africa, Asia and South America, there is one way of controlling invertebrate-borne diseases, which is by controlling the invertebrate vector.
The extent of the impact depends on characteristics of both the pest and host tree. [10] Pests differ in their means of attack and extent of damage. For example, defoliating insect (spongy moth) may weaken trees but not directly cause mortality, while boring insects (emerald ash borer) can often cause serious damage.
[3] [4] Symptoms of infection include stunted growth, discoloration of bulbs, and swollen stems. D. dipsaci is a migratory endoparasite that has a five-stage lifecycle and the ability to enter into a dormancy stage. D. dipsaci enters through stomata or plant wounds and creates galls or malformations in plant growth. This allows for the entrance ...