The specialized fungal hyphal branch that bears the conidium.
Using low power magnification you can see the upright conidiophores with chains of conidia of grape powdery mildew that look like a row of tiny water droplets or a short string of tiny pearls.
Asexual spore formed by abstriction and detachment of part of a hyphal cell at the end of a conidiophore and germinating by a germ tube.
Conidium of Alternaria solani that has germinated on the surface of a potato leaf and formed several appressoria. (Dark elongate structure is the conidium while the dark circular object is an air bubble.)
The noncellular outer layer of an insect or a nematode; water-repellent, waxy layer of epidermal cells of plant parts, such as leaves, stems, and fruit.
a serological test in which the sensitivity of the reaction is increased by attaching an enzyme that produces a colored product to one of the reactants.
Plants in a given population that remain free of disease where it is prevalent, although they possess no natural inherent resistance to the disease. (See Klendusity).
Yellowing and long, spindly growth as a result of insufficient light.
Sunflower seedlings stretched out (etiolated) seeking the sunlight.
Jay W. Pscheidt, 2019.
These perennial Vinca shoots were under or covered by a large upside down pot. The stems grew long and chlorotic reaching for the light coming through the drain holes until the pot was removed.
A substance (usually liquid) formed inside a plant and discharged from diseased or injured tissue. The presence of an exudate often aids in diagnosis (e.g., fire blight bacteria).
The loss of turgor and the drooping of plant parts, usually following a water deficit. The death of a branch in a tree where the leaves remain attached. In either case, the diseased portion stands out like a flag.
Many flagging branches in this hazelnut orchard that have been girdled by eastern filbert blight.
