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Bottom Heat (Soil or Root-zone Heating) Definition: Bottom heat refers to the artificial or natural warming of the root zone of plants, typically applied to...

Botrytis (Gray mold, Botrytis cinerea) Type: Fungal plant pathogen Taxonomy: Kingdom: Fungi Phylum: Ascomycota Class: Leotiomycetes Order: Helotiales Family: Sclerotiniaceae Genus: Botrytis Species: Botrytis cinerea Description:Botrytis cinerea is a necrotrophic fungus that attacks a...

Bordeaux Mixture (Copper sulfate and lime mixture) Type: Fungicidal spray / plant protectant Composition: A mixture of copper(II) sulfate (CuSO₄·5H₂O) and slaked lime (Ca(OH)₂) in water....

Borax (Sodium borate, Na₂B₄O₇·10H₂O) Type: Mineral / micronutrient fertilizer Source: Naturally occurring borate mineral, typically mined from evaporite deposits in arid regions. Purified borax is a...

Type: Organic fertilizer / soil amendment Source: Finely ground or crushed animal bones, typically from cattle or other livestock. Description: Bone manure is a slow-release, phosphate-rich...

Bark Beetles (Family: Curculionidae, Subfamily: Scolytinae) Bark beetles are a diverse group of small, wood-boring beetles known for their ability to tunnel beneath the bark...

Definition Bark-Bound (Physiological Condition in Trees and Shrubs) Bark-bound, also known as girdling or constricted bark syndrome, is a physiological condition affecting trees and woody shrubs...

Bark Ringing (Girdling in Trees and Shrubs) Definition Bark ringing, also known as girdling, is the removal or damage of a complete ring of bark around...

Basal Rot (Root and Crown Rot in Plants) Definition Basal rot is a fungal or bacterial disease that affects the base of a plant’s stem, crown,...

Basic Slag (Thomas Slag) – A Botanical and Agricultural Entry Definition and Composition Basic slag, also known as Thomas slag, is a byproduct of the steel industry,...