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S. marcescens is a motile organism and can grow in temperatures ranging 5–40 °C (41–104 °F) and in pH levels ranging from 5 to 9. It is differentiated from other Gram-negative bacteria by its ability to perform casein hydrolysis, which allows it to produce extracellular metalloproteinases which are believed to function in cell-to-extracellular matrix interactions.
Early leaf spot of peanut can be treated through the use of fungicides applied at the very early pod stage, and applied every two weeks thereafter. [4] After analyzing the incidence and severity of the disease, strip-tillage techniques have also proven to be effective in delaying an epidemic by reducing the amount of initial infection. [9]
Exobasidium vaccinii, commonly known as “red leaf disease,” or “Azalea Gall,” is a biotrophic species of fungus that causes galls on ericaceous plant species, such as blueberry and azalea (Vaccinium and Rhododendron spp.). Exobasidium vaccinii is considered the type species of the Exobasidium genus. [1]
Purple leaf sheath Hemiparasitic bacteria and fungi Pyrenochaeta stalk rot and root rot Phoma terrestris = Pyrenochaeta terrestris: Pythium root rot Pythium spp. Pythium arrhenomanes Pythium graminicola. Pythium stalk rot Pythium aphanidermatum = Pythium butleri: Red kernel disease. Ear mold, leaf and seed rot Epicoccum nigrum: Rhizoctonia ear ...
Black garden ants (Lasius niger) eating a durian at a market in Pulilan, Bulacan.Note also the fuzzy white scale insect in the center.. Durians are an agricultural product affected by many plant pathogens and pests.
Spilocaea oleaginea is a deuteromycete fungal plant pathogen, the cause of the disease olive peacock spot, also known as olive leaf spot and bird's eye spot. This plant disease commonly affects the leaves of olive trees worldwide. The disease affects trees throughout the growing season and can cause significant losses in yield.
The optimum temperature for the disease development has been reported to be 15-20 °C, the first symptom seen after 6 hours of leaf wetness, with the lesion development decreasing with increasing periods of dryness. [7] [8] At temperatures between 9-25 °C, lesion development increases with increasing temperature and leaf wetness. Based on ...
Leaf (adaxial) of bur oak infected by BOB Leaf (adaxial) of bur oak infected by BOB. When affected by the disease, the oak develops vein necrosis confined to the leaf midvein and major lateral veins, eventually causing leaf death. Symptoms typically start in the lower crown of the tree and eventually spread to the entire tree. [3]