Aphids are small, teardrop-like insects with a sharp mouth called a stylet (Levy). The aphids spread PPV in a non-persistent manner and are retained for no more than a few hours (Plum Pox Virus). Several aphid species that are common in Pennsylvania have helped spread PPV. The green peach tree aphid, Myzus persicae, has been the main culprit in infecting the orchards in Pennsylvania (Levy). The aphids are not very smart in determining what type of plant they have landed on. .
They use their stylet and taste the plant's sap to figure out the plant in which they have landed on. After that "taste" test is how they get the virus and by tasting another plant is how they transmit PPV if the conditions are right (Probing). The virus will not however, adhere to the mouth of the aphid when they probe "deep into the plant's phloem, the circulatory system that carries nutrients and sugars" (Probing). The common time for the aphids to infect the trees is spring and autumn and spread is very low in July and August (Levy).
Symptoms.
Symptoms depend on the host species and on the strain of the virus (Plum Pox Virus). PPV symptoms appear on flowers, seeds, leaves, and fruit. "Leaves and fruit show cholortic (yellowing) and necrotic (browning) ring patterns, and cholortic bands or blotches" (Levy). The symptoms can also be absent from leaves and fruit during the growing season. Plums and apricots may be misshapen or deformed, or rings may appear on their stones (Levy). Some cherry fruits will develop cholortic and necrotic rings, premature fruit drop, and notched marks (Levy).
Detection.
The easiest method in detection of PPV is using biological index hosts (Levy). It is also detected dependably in woody plants. Strains D and M can be differentiated through western blots according to their molecular weight of the viral coat protein (Levy). Certain techniques in the detection of plum pox have lead to advances in the field of diagnostic plant pathology (Levy).
What do you think of when you here the term chicken pox? ... Causes Chicken pox is caused by the varicalla-zoster virus (VZV). Chicken pox is very contagious, approximately four million cases occur each year. ... Chicken pox is also deadly, every year there are hundreds of deaths from chicken pox. ... Almost ninety percent of all American's are destine to catch chicken pox. ...
If the vaccine is given and a person still gets chicken pox, it will be much less severe. Chicken pox is transmitted through the air. When a patient with chicken pox coughs or sneezes, they expel tiny droplets that carry the chicken pox virus. If a person who has never had chicken pox inhales these particles, the virus enters the lungs and is carried through the blood to the skin where it causes the typical rash of chicken pox. ... If you get chicken pox, several things can be done to help relieve the symptoms. ...
Well I have and I think it is a mix between small pox and the bubonic Plague. ... There are 3 types of small pox, the true virulent form and the mild form alas tram, and a cattle form called cattle pox. Small pox also got the name Great pox. ... Small pox was believed to be originated form Europe. ... And I believe that they both were really bad but the Black Death has taken many more lives than small pox....
One, it is very easy for anyone to obtain samples of harmful agents, such as anthrax or small pox. ... Deadlier samples of such viruses, as small pox, and even Ebola, may be just at the fingertips of major terrorist groups. ... The agent's anthrax, plague, brucellosis, small pox, viral encephalitis, and viral hemorrhagic fevers are of particular concern. ... A chemical release or a major explosion is a lot more manageable than a biological attack posed by Anthrax, or small pox. ... With the use of small pox or Anthrax, day after day, additional cases could be expected, and in new areas. ...
The Women of Plums captures the voices of several slave women, their stories their ideas and their feelings. ... Books like The Women of Plums will rarely be seen in an American History class, but those of us who have read it must pass it on and realize the importance of preserving the memory of women in slavery. ...
From a sociological view-point the two movements can be seen as follows: the modern' movement taking into account the changes brought about by the Industrial Revolution, and the "postmodern' movement, the changes brought upon us by the Information Revolution (Macionis, Plummer, 1998). ... Peter Berger has clearly expressed four major characteristics of the modern age (Macionis, Plummer, 1998). ... This is linked to Berger's next point; the increase of diversity in beliefs (Macionis, Plummer, 1998). ... This is what Weber saw as the "disenchantment- of the world (Macionis, Plumm...
While monkeys served as a host for this disease, they were only "seasonal hosts,"" a more likely host is thought to be tree squirrels, and human conception of this pox virus comes from children, who are more greatly infected, who probably contracted the virus by playing with the squirrels. ... Information about the Monkey Pox Outbreak. ...
Even though Koch and Williams were born way apart of each other it seems Koch is writing this poem out of retaliation for Williams eating his plum. ... Chopping down the house resembled the eating of the plum. The inviting wooden beams are the description of the plum. ... Therefore, If Williams hadn't eaten the plums, he would still have his summerhouse. ... Those three adjectives can also describe a plum. ...
