Colletotrichum coffeanum var. virulans
Coffee Berry Disease was first reported from Kenya in 1922. It has since been recorded from most of the other coffee areas in Africa. It is not known outside of Africa, although a leaf spot and ripe berry anthracnose caused by related Colletotrichum species has been reported from Guatemala and Brazil. Although this pathogen is capable of infecting leaves, stem bark and twigs of the coffee plant, only the strain or species of Colletotrichum that can infect immature or green berries is the causal organism of CBD. Direct losses occur as a result of flower and young fruit infection. Where the virulent strains of CBD occur, serious losses have been reported. When first reported from Kenya, 75 percent losses were noted in some farms. The disease has been responsible for the abandonment of coffee growing in several districts of Kenya and Ethiopia.

Dothistroma pini (Scirrhia pini)
Dothistroma blight is a devastating foliar disease of a wide range of pine species. The causal fungus, Dothistroma pini Hulbary, infects and kills needles. Successive years of severe infection result in decreased growth and, ultimately, death.

Erwinia amylovora
Fire blight is a disease caused by the bacterium Erwinia amylovora. It infects pears, apples and quince as well as ornamental plants of the Roseaceae family including cotoneaster, hawthorn and pyracantha. Blossoms are usually infected first and have a water-soaked appearance. Eventually the blossoms will wilt, shrivel and blacken. A sticky ooze, which contains millions of bacteria, will seep from the infected area. A severe outbreak can result in the loss of flowers and therefore fruit. It can also cause die-back on trees and potentially wipe out a whole orchard.

Peronospora hyoscyami de Bary f.sp. tabacina (Adam) skalicky
Blue mold of tobacco (also known as 'mildiou du tabac' in Europe), caused by Peronospora tabacina Adam, is a classical compound-interest plant disease that develops into local as well as macroscale epidemics. The fungus is highly weather-sensitive. During periods of cool, wet and overcast weather the disease develops and spreads rapidly because of the polycyclic multiplication of the pathogen. The rapid rate of development is determined by potentially high levels of initial source inoculum, short latent period, and large numbers of effective dispersal units or spores. When the weather becomes clear, hot and dry, the epidemic usually slows or stops completely.

Ralstonia solanacearum
This disease occurs in most warm tropical and subtropical regions of the world. Plants of the family Solanaceae, such as tomato, bell pepper, eggplant, potato and tobacco, are affected by this wilt disease. Infected plants show a progressive wilting that finally ends in plant death; the inside tissues of the stem are discolored. The causal organism is a bacterium that is found in the soil. Once the bacterial wilt organism has become established in a field, it is extremely difficult to eradicate. Bacterial wilt can affect many crop plants, and a large number of weeds as well. Some plants that can become infected by this organism do not show symptoms but are important in the survival of the bacteria.

Sugar Cane Fiji Disease virus
Sugar Cane Fiji Disease virus is known to be present in a number of islands in the Pacific Ocean region from Western Samoa to New Guinea and is found as far north as the Philippines. It has also been found in the Malagasy Republic, Thailand and West Malaysia. Vectors that spread the disease are plant-hopping insects.

Tilletia Indica
The fungus Tilletia indica Mitra, cause of karnal bunt (partial bunt) disease of wheat, originated in Asia but has now spread to Mexico and more recently the United States. The fungus can occasionally cause very significant reductions in grain quality and is the subject of stringent quarantine regulations in many countries. Typically, only a portion of the kernel is affected; this is why the disease is sometimes called partial bunt. The damage is twofold: infected plants produce less grain, and the quality of the grain itself is lessened. Flour made from bunted kernels is discolored and has an unpleasant, though harmless, odor and taste. Generally, wheat containing more than 3 percent bunted kernels is considered unfit for human consumption. Wheat containing lower percentages of bunted kernels may be salvaged and combined with healthy grain. Wheat containing any amount of bunted kernels, however, is somewhat reduced in quality. Although the overall crop losses caused by Karnal bunt might not be severe, the disease has quarantine significance.

Xanthomonas albilineans
Xanthomonas albinieans is a bacterium that causes "leaf scald" on sugar cane plants. Leaves of young plants may show bleaching or yellowing. The characteristic symptom of leaf scald is the presence of one or more narrow, white "pencil lines" running longitudinally down the leaf blade into the sheath. Bands of dead tissue may develop along pencil lines and expand until the entire leaf is dead. Young shoots may be killed. Mature stalks may show leaf symptoms and develop side shoots with symptoms. Under severe disease conditions, entire plants may die. The bacterium lives from year to year in infected plants. It is spread by the harvester and possibly by other cultivation practices that cause plant wounding. The disease can be spread aerially in windblown rain.