Bulbs
Flower Basics
Flower Beds & Specialty Gardens
Flower Garden
Garden Furniture
Garden Gnomes
Garden Seeds
Garden Sheds
Garden Statues
Garden Tools & Supplies
Gardening Basics
Green & Organic
Groundcovers & Vines
Growing Annuals
Growing Basil
Growing Beans
Growing Berries
Growing Blueberries
Growing Cactus
Growing Corn
Growing Cotton
Growing Edibles
Growing Flowers
Growing Garlic
Growing Grapes
Growing Grass
Growing Herbs
Growing Jasmine
Growing Mint
Growing Mushrooms
Orchids
Growing Peanuts
Growing Perennials
Growing Plants
Growing Rosemary
Growing Roses
Growing Strawberries
Growing Sunflowers
Growing Thyme
Growing Tomatoes
Growing Tulips
Growing Vegetables
Herb Basics
Herb Garden
Indoor Growing
Landscaping Basics
Landscaping Patios
Landscaping Plants
Landscaping Shrubs
Landscaping Trees
Landscaping Walks & Pathways
Lawn Basics
Lawn Maintenance
Lawn Mowers
Lawn Ornaments
Lawn Planting
Lawn Tools
Outdoor Growing
Overall Landscape Planning
Pests, Weeds & Problems
Plant Basics
Rock Garden
Rose Garden
Shrubs
Soil
Specialty Gardens
Trees
Vegetable Garden
Yard Maintenance
Lemon Trees with White Spots
Lemon Trees with White Spots. Lemons are generally easy to grow and are rarely the victims of diseases, such as those that cause white spots on the leaves or fruit. If you notice any white spots, treat the problem promptly to ensure your tree's health.
Lemons are generally easy to grow and are rarely the victims of diseases, such as those that cause white spots on the leaves or fruit. If you notice any white spots, treat the problem promptly to ensure your tree's health.
Types of Diseases and Insects
Powdery mildew is a common fungal disease that can attack lemon trees and other plants. It causes fuzzy white spots to grow on the leaves. Citrus canker is a bacterial disease that also causes white spongy spots to form on leaves. Some types of scale insects are white: they suck fluids from the tree and can kill the tree if you don't treat them.
Causes of Diseases and Insect Attack
Poor air circulation among lemon trees can contribute to the development of powdery mildew. The citrus leafminer insect can introduce canker. Ants often carry scale insects to a lemon tree, where they feed on their sweet excretion.
Treating Diseases and Insects
Spray your lemon tree with sulfur if it develops powdery mildew: early detection is key. Unfortunately, no cure exists for canker: you must destroy your tree if it develops this disease. Keep ants away to prevent a scale insect attack: use a sticky barrier product on the trunk or insert ant stakes into the soil. Spray scale insects with 1 tbsp. canola oil mixed with 1 quart of insecticidal soap.
