A short branch of old wood extending from the trunk or cordon on which canes or spurs are borne.
Any invertebrate animal (including insects, mites, spiders, and crustaceans) that has a jointed body and limbs.
The sexual spore of an ascomycete fungus.
Pruning the vine based on its growth and number of nodes the previous growing season. A method of determining the potential fruiting capacity of a vine at pruning time.
A shoot arising from a bud at the base of a cane.
Flow of plant sap from wounds.
A scale used to indicate soluble solids content: ºBrix = grams of sucrose per 100 grams of liquid at 68ºF.
The compound bud or eye in the axil of a leaf, at the node.
Parenchyma tissue that grows over a wound or graft and protects it from drying or injury.
The petals of a grape flower.
A mature woody, brown shoot that develops after leaf fall.
A necrotic, localized disease area with a sharp line of demarcation between healthy and diseased tissue. Usually on trunks or canes.
The entire foliage of a grapevine as it is positioned on the trellis.
Yellowing of normally green parts of the plant, especially shoots and leaves.
The sexual fruiting body of a powdery mildew fungus.
Asexual spores formed by several types of fungi.
An extension of the grapevine trunk, usually horizontally oriented and trained along the trellis wire.
The ratio of crop size/vine size.
The fruit weight per vine (in pounds) measured at harvest.
A portion of the canopy composed of the current season’s shoot growth that is normally oriented downward.
That stage when the plant is not actively growing.
Weeds in a treated area that have been missed or that have survived the treatment.
The individual flower of a cluster.
Impermeable soil layers or texture changes that prevent free downward movement of water.
One-year-old wood (cane) that produces the current season’s crop.
A chemical or physical agent that kills fungi or inhibits its growth.
An abnormal growth of plant tissue caused by stimuli external to the plant itself, generally caused by insects or parasitic bacteria. Example: Phylloxera gall.
The initial hyphae strand from a germinating fungus spore.
The top of the vine where canes are selected to produce the current season’s crop.
Trimming ends of shoots in a vertically shoot-positioned traning system, such as VSP.
The process in which a pathogen enters, invades, or penetrates a host plant and establishes a parasitic relationship with it.
The time required for a plant pathogen to penetrate host plant tissue and establish a parasitic relationship. Length of the infection period depends on environmental factors such as wetness duration and temperature, and host susceptibility.
That portion of the cane or shoot between nodes.
Side branches of a shoot or cane.
A wound or delimited disease area.
The period of time between fertilization of an insect egg and the death of the individual that proceeds from that egg. In most insects, includes the stages of egg, larva (grub), pupa, and adult.
A dried and shriveled grape berry resulting from attack by a fungus.
The localized death of plant tissue, generally brown or black in color.
The thickened portion of a shoot or cane where the leaf and its compound bud are attached.
A thick-walled, sexually derived resting spore of oomycete (downy mildew) fungi.
The stem of an individual flower or berry.
That portion of the rachis extending from the shoot to the first branch of the cluster.
The stem end of a leaf.
A chemical substance (i.e., sex attractant) produced by an animal that serves as a stimulus to other individuals of the same species for a behavioral response.
Physical removal of portions of the vine for the purpose of maintaining size and productivity.
An asexual, globose, or flask-shaped fruiting body of a fungus that produces conidia. See Conidia.
The main stem or axis of a cluster. The framework of the cluster to which the pedicels are attached.
A cane pruned to one or two nodes, generally on an arm or cordon. Its primary purpose is to position a cane for fruiting the following season.
That period of nonvisible growth controlled by internal factors. Visible growth will not occur even under favorable environmental conditions.
Hard, dark, and rounded mass of fungal tissue that permits survival in adverse environments.
That physiological stage following bloom when impotent flowers and small green berries begin to drop from the cluster.
The green, leafy growth developing from a cane, spur, cordon, or trunk. The developing growth is the source of leaves, stems, tendrils, flowers, and fruit.
Trimming ends of shoots in a downward shoot-positioned training system, such as High Cordon.
The grape flesh separates readily from the skin.
A sporangium-bearing body of the downy mildew fungus.
A fungal structure producing asexual spores, usually zoospores.
A reproductive body of a fungus.
A cane pruned to one or two nodes. A fruiting spur is chosen to produce shoots with fruit. See Renewal Spur.
An opening or pore usually in the lower surface of a leaf that functions in gas exchange.
A shoot arising from a bud below ground.
A weak shoot produced in the axil of the leaf adjacent to the bud.
The main, upright structure of the vine from which arms, cordons, shoots, and canes arise. Vines may have more than one trunk.
That physiological stage in the development of a grape berry when it begins to ripen as indicated by color change and fruit softening.
Weight of cane prunings on a vine. Measured by weighing cane pruning per vine (in pounds) during the dormant season.
An unwanted shoot arising from buds on the trunk.
The build up of tolerant weed species.
A fungal spore with flagella, capable of locomotion in water.