Pests & Diseases

⏱️ 10 min read

📅 Last updated: 2024

🐛 Pests & Diseases

Pest Risk Matrix — Risk assessment for common jasmine pests — color-coded by severity (red = high, orange = medium, green = low).

Common Jasmine Pests — Identification chart for the most common pests affecting jasmine — aphids and caterpillars pose the highest risk.

Identification, prevention, organic solutions, and IPM

Organic Pest Control Recipes

🧴

Neem Oil Spray

Mix: 2 tbsp neem oil + 1 tsp liquid soap + 1 liter water. Shake well. Spray on leaves (top and bottom) in evening. Effective against aphids, whiteflies, mealybugs. Reapply every 7 days.

🧄

Garlic-Pepper Spray

Mix: Blend 10 garlic cloves + 2 hot peppers + 1 liter water. Steep overnight. Strain. Add 1 tsp soap. Spray on plants. Deters caterpillars, beetles, and many insects.

🥛

Baking Soda Fungicide

Mix: 1 tbsp baking soda + 1 tsp liquid soap + 1 gallon water. Spray on powdery mildew and leaf spot. Apply weekly as prevention. Do not apply in direct sun.

🌿

Herb Infusion

Mix: Steep 200g crushed basil, mint, or lavender in 1 liter boiling water for 24 hours. Strain. Dilute 1:10. Spray on aphids and spider mites. Pleasant scent for humans.

Companion Planting for Pest Control

✅ Pest-Repelling Companions

Marigold: Deters nematodes, whiteflies, aphids
Basil: Repels aphids, whiteflies, mosquitoes
Lavender: Deters moths, fleas, flies
Chrysanthemum: Natural pyrethrin source, kills insects
Tansy: Repels ants, beetles, squash bugs

✅ Beneficial Insect Attractors

Sweet Alyssum: Attracts lacewings (aphid predators)
Dill: Attracts ladybugs and parasitic wasps
Fennel: Attracts hoverflies and beneficial wasps
Cosmos: Attracts predatory beetles
Sunflower: Attracts pollinators and pest predators

IPM Decision Flowchart

            🌿 Integrated Pest Management Steps
            Scout Weekly: Walk through fields every 7 days. Check undersides of leaves, new growth, and flower buds.
Identify: Is it a pest, disease, or nutrient deficiency? Use photos and guides.
Assess Damage: Is it cosmetic or threatening yield? Economic threshold: treat if >10% of plants affected.
Choose Response: Cultural control first → Biological control → Low-risk organic → Chemical (last resort).
Apply Treatment: Follow label instructions. Time applications for early morning or evening.
Monitor Results: Check again in 3–7 days. Repeat if necessary. Rotate products to prevent resistance.

        

Common Pests

Aphids

Aphis gossypii

Sap-sucking insects on new growth causing leaf curling and sooty mold.

Organic: Neem oil, insecticidal soap, ladybugs. Chemical: Imidacloprid (last resort).

Whiteflies

Bemisia tabaci

White flying insects transmitting viruses and weakening plants.

Organic: Yellow sticky traps, parasitic wasps (Encarsia). Chemical: Spinosad.

Spider Mites

Tetranychus urticae

Microscopic pests causing stippled, bronzed foliage in hot, dry conditions.

Organic: Predatory mites, sulfur, horticultural oil. Increase humidity.

Mealybugs

Planococcus citri

White cottony insects secreting honeydew and promoting sooty mold.

Organic: Isopropyl alcohol, neem oil, parasitic wasps.

Jasmine Budworm

Helicoverpa armigera

Caterpillars boring into flower buds, destroying them before opening.

Organic: Bt (Bacillus thuringiensis), pheromone traps, hand-picking.

Root-Knot Nematodes

Meloidogyne spp.

Roundworms causing root galls, stunting growth and reducing yield.

Organic: Marigold intercropping, solarization, neem cake. Use resistant rootstock.

Common Diseases

Leaf Spot

Cercospora jasminicola

Brown to black spots on leaves with yellow halos.

Organic: Remove infected leaves, copper fungicide, improve air circulation.

Powdery Mildew

Oidium jasminis

White powdery coating on leaves and stems.

Organic: Baking soda spray, sulfur, potassium bicarbonate. Increase spacing.

Root Rot

Phytophthora spp.

Brown, mushy roots causing wilting and death.

Organic: Improve drainage immediately. Remove affected plants. Trichoderma biocontrol.

Fusarium Wilt

Fusarium oxysporum

Vascular disease causing progressive yellowing and death.

Organic: Remove and solarize soil. Use disease-free planting material. 5-year rotation.

🧪 Test Your Knowledge

1What is the economic threshold for treating a jasmine pest under IPM?

AAny single pest spotted

BMore than 10% of plants affected

CMore than 50% of plants affected

DOnly treat after yield is lost

✅ IPM treats only when damage threatens yield — the guideline here is more than 10% of plants affected, after scouting and identifying the pest.

2Which pest bores into flower buds and destroys them before they open?

AAphids (Aphis gossypii)

BSpider mites (Tetranychus urticae)

CJasmine budworm (Helicoverpa armigera)

DRoot-knot nematodes (Meloidogyne spp.)

✅ The jasmine budworm caterpillar bores into buds. Control with Bt, pheromone traps, and hand-picking.

3What is the correct neem oil spray recipe?

A2 tbsp neem oil + 1 tsp soap per liter of water, sprayed in the evening

BPure neem oil, sprayed at midday

C1 cup neem oil per liter, weekly

DNeem powder sprinkled on flowers

✅ Mix 2 tbsp neem oil + 1 tsp liquid soap + 1 liter water, and spray leaf tops and undersides in the evening, reapplying every 7 days.

4Which companion plant deters nematodes and whiteflies?

ASweet alyssum

BDill

CSunflower

DMarigold

✅ Marigold deters nematodes, whiteflies, and aphids — and can be intercropped to fight root-knot nematodes. Alyssum, dill, and sunflower attract beneficial insects instead.

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