A close view over a mixed vegetable canopy with a few leaves carrying early blemishes.
Crop Science

Plant Pests & Plant Diseases: Identify and Treat Crop Problems

There's a solution to every crop problem.

This library covers 82 plant pests and diseases of commercial crops - insects, mites and nematodes, the fungal, bacterial and viral plant diseases, and the nutritional and physiological disorders that are routinely mistaken for them.

Not sure what's attacking your crop? Ask Vegalab for a diagnosis and a crop-specific program. Request a diagnosis

Every entry sets out how to identify the problem, its life cycle and spread, the conditions that favour it, how to monitor for it, and the management options - including the ones that are not ours and where they fall short. Product claims, rates and availability vary by jurisdiction; always follow the applicable label.

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Insects & Mites 27

Sap-suckers, borers and mites · identify the pest and match it to a natural control.

Nematodes 3

Microscopic roundworms that attack roots below ground - root-knot, sting, ring, lesion and more, each identified by assay.

Soil & Root Pests 1

Soil-dwelling parasites that attack roots and rob vigour below ground.

Slugs, Worms & Other Pests 3

Slugs, snails, invasive worms and aquatic larvae - pests that don't fit the usual groups.

Fungal & Oomycete Diseases 26

Mildews, blights, rots and wilts - including oomycetes like downy mildew and Phytophthora.

Bacterial Diseases 6

Blights, cankers and spots spread by water and wounds - prevention-led management.

Viruses 3

No cure once infected · these guides lead with prevention and insect-vector control.

Disorders & Nutrient Deficiencies 12

Not a pest at all - nutrient, water and physiological problems and how to correct them.

Beneficial & Apiary Threats 1

Invasive predators of beneficial insects - managed to protect honey bees and pollination, with bee-safety built into the method.

Insects & Mites 27

Insects & MitesAphidsTomatoes, Peppers, Brassicas, OrnamentalsInsects & MitesApple MiteApples, Pears, Stone FruitInsects & MitesArmyworm & CutwormCereals, Corn, Brassicas, VegetablesInsects & MitesBroad & Russet MitesPeppers, Tomatoes, Cannabis, CitrusInsects & MitesCabbage LooperCabbage, Lettuce, Broccoli, TomatoInsects & MitesCaterpillarsBrassicas, Tomatoes, Corn, GrapesInsects & MitesCitrus Rust MiteCitrus, Oranges, Grapefruit, LemonsInsects & MitesClearwing & Peach Tree BorersPeach, Cherry, Plum, AppleInsects & MitesCodling MothApples, PearsInsects & MitesCotton BollwormCotton, Corn, Tomato, PepperInsects & MitesDiamondback Moth & Cabbage CaterpillarsCabbage, Broccoli, Cauliflower, CanolaInsects & MitesLeaf MinersTomatoes, Leafy Greens, Ornamentals, CitrusInsects & MitesLeaffolderRiceInsects & MitesLeafhoppersCotton, Vines, Potato, VegetablesInsects & MitesLygus & Plant BugsCotton, Strawberries, Vegetables, LegumesInsects & MitesMealybugsVines, Citrus, Tree fruit, CannabisInsects & MitesMelonworm & PicklewormCucumber, Melon, Squash, PumpkinInsects & MitesOriental Fruit MothPeach, Apple, Plum, NectarineInsects & MitesPeach Fruit Moth (Carposina)Peaches, Apples, PearsInsects & MitesPink BollwormCotton, OkraInsects & MitesScale InsectsTree fruit, Citrus, Vines, OrnamentalsInsects & MitesSpider MitesStrawberries, Cannabis, Grapes, TomatoesInsects & MitesStem BorersCorn, Rice, Sugarcane, SorghumInsects & MitesThripsOnions, Peppers, Ornamentals, GrapesInsects & MitesTicksTurf and OrnamentalInsects & MitesWestern Flower ThripsGreenhouse crops, Peppers, Tomatoes, StrawberriesInsects & MitesWhitefliesTomatoes, Cucumbers, Peppers, Ornamentals

Nematodes 3

NematodesLesion NematodeCereals, Corn, Tree fruit, PotatoNematodesRoot-Knot NematodesTomatoes, Cucumbers, Melons, PeppersNematodesPlant-Parasitic Nematodes

Soil & Root Pests 1

Soil & Root PestsReniform NematodeCotton, Vegetables, Soybean, Sweet potato

Slugs, Worms & Other Pests 3

Slugs, Worms & Other PestsJumping WormsOrnamentals, Turf, Nursery, VegetablesSlugs, Worms & Other PestsMosquito LarvaeIrrigated Row Crops, Orchards, GreenhouseSlugs, Worms & Other PestsSlugs & SnailsLettuce, Brassicas, Strawberries, Seedlings

Fungal & Oomycete Diseases 26

Fungal & Oomycete DiseasesAnthracnoseBeans, Cucurbits, Tomatoes, BramblesFungal & Oomycete DiseasesBlack SigatokaBananas, PlantainsFungal & Oomycete DiseasesBrown Rot of Stone FruitPeach, Nectarine, Cherry, PlumFungal & Oomycete DiseasesCanopy Blight & Leaf Spot ComplexTomato, Potato, Cucurbits, BrassicasFungal & Oomycete DiseasesCercospora Leaf SpotSugar Beet, Peanuts, Carrots, SoybeansFungal & Oomycete DiseasesDamping-OffSeedlings, Vegetable Transplants, OrnamentalsFungal & Oomycete DiseasesDowny MildewGrapes, Cucurbits, Lettuce, BrassicasFungal & Oomycete DiseasesEarly BlightTomatoes, PotatoesFungal & Oomycete DiseasesEastern Filbert BlightHazelnut, Filbert, Tree NutsFungal & Oomycete DiseasesGray Mold (Botrytis)Strawberries, Grapes, Brambles, TomatoesFungal & Oomycete DiseasesLate Blight (Phytophthora)Tomatoes, PotatoesFungal & Oomycete DiseasesLeaf Blister & Leaf CurlPeach, Nectarine, Almond, Stone fruitFungal & Oomycete DiseasesLeaf MoldTomatoesFungal & Oomycete DiseasesPhomopsis BlightVines, Cucurbits, Eggplant, Tree fruitFungal & Oomycete DiseasesPhytophthoraTree fruit, Vines, Cucurbits, PeppersFungal & Oomycete DiseasesPhytophthora Root Rot of AvocadoAvocadoFungal & Oomycete DiseasesPowdery MildewGrapes, Cucurbits, Apples, BramblesFungal & Oomycete DiseasesPythium & Damping-OffVegetables, Greenhouse crops, Cucurbits, Field cropsFungal & Oomycete DiseasesRhizoctonia (Root Rot & Damping-Off)Vegetables, Potato, Cotton, TurfFungal & Oomycete DiseasesRice BlastRice, Row CropsFungal & Oomycete DiseasesRust DiseasesApples, Cereals, Beans, OrnamentalsFungal & Oomycete DiseasesSclerotinia (White Mold)Beans, Canola, Lettuce, SunflowerFungal & Oomycete DiseasesSeptoria Leaf SpotTomato, Celery, Cereals, LettuceFungal & Oomycete DiseasesSooty MoldCitrus, Tree fruit, Vines, OrnamentalsFungal & Oomycete DiseasesTake-AllWheat, Barley, TurfFungal & Oomycete DiseasesVerticillium & Fusarium WiltTomatoes, Strawberries, Potatoes, Cucurbits

Bacterial Diseases 6

Bacterial DiseasesBacterial BlightBeans, Brassicas, Stone Fruit, RiceBacterial DiseasesBacterial Blight of RiceRiceBacterial DiseasesBacterial Shot HolePeaches, Cherries, Plums, ApricotsBacterial DiseasesBacterial Spot & SpeckTomato, Pepper, Peach, Stone fruitBacterial DiseasesFire BlightApples, PearsBacterial DiseasesWalnut BlightWalnuts, Tree Nuts

Viruses 3

VirusesCurly TopTomatoes, Peppers, Sugar Beet, BeansVirusesLeaf Curl VirusesTomatoes, Peppers, CucurbitsVirusesMosaic VirusTomatoes, Cucurbits, Peppers, Tobacco

Disorders & Nutrient Deficiencies 12

Disorders & Nutrient DeficienciesBlossom-End RotTomatoes, Peppers, Squash, MelonsDisorders & Nutrient DeficienciesBrown Spot & Cork SpotPears, ApplesDisorders & Nutrient DeficienciesCalcium Deficiency (Tip Burn)Lettuce, Brassicas, Tomatoes, PeppersDisorders & Nutrient DeficienciesDrought Stress & Stress CrackingTomatoes, Stone Fruit, Grapes, VegetablesDisorders & Nutrient DeficienciesFruit Cracking & SplittingTomatoes, Cherries, Grapes, Stone FruitDisorders & Nutrient DeficienciesMagnesium DeficiencyTomatoes, Grapes, Potatoes, CitrusDisorders & Nutrient DeficienciesMicronutrient DeficiencyCitrus, Grapes, Vegetables, OrnamentalsDisorders & Nutrient DeficienciesNitrogen DeficiencyAll CropsDisorders & Nutrient DeficienciesPoor Fruit Color & Low BrixGrapes, Apples, Tomatoes, BerriesDisorders & Nutrient DeficienciesPoor Root DevelopmentAll CropsDisorders & Nutrient DeficienciesSalt & pH Soil ImbalanceAll Crops, GreenhouseDisorders & Nutrient DeficienciesWeak Stems & LodgingCereals, Wheat, Barley, Tall Vegetables

Beneficial & Apiary Threats 1

Beneficial & Apiary ThreatsAsian Hornet (Vespa velutina)

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