All Guides
Comprehensive guides organized by category for your hazelnut garden.
43 guidesCare Calendar
Monthly hazelnut care guide 3 guides
March Hazelnut Care Guide
First nitrogen fertilization, final pruning, shoot moth and gall midge monitoring, sapling planting in the hazelnut orchard in March. Guide supported by official sources.
March 1, 2026
February Hazelnut Care Guide
Pruning, fertilization, pest spraying and pollination monitoring in the hazelnut garden in February. Guide supported by official sources.
February 25, 2026
January Hazelnut Care Guide
Winter pruning, sucker removal, dormant-season spraying, soil sampling, snow damage checks and infrastructure repair in the hazelnut orchard in January. Guide supported by official sources.
February 15, 2026
Pest Control
Pest identification and control methods 14 guides
Citrus Long-Horned Beetle: An Emerging Threat to Hazelnut Orchards
What is the citrus long-horned beetle (Anoplophora chinensis), its damage to hazelnut orchards, symptoms and control methods.
February 27, 2026
Fall Webworm on Hazelnut (Hyphantria cunea): Web Nests and Control
Fall webworm: silken web nests under the leaves, foliage eaten down to the midrib. Two to three generations a year; spray while the webs are new. Cutting and burning the nests is the most effective method.
August 27, 2026
Hazelnut Shoot Moth (Gypsonoma dealbana): Symptoms and Spray Timing
Hazelnut shoot moth: triangular brown patches on the leaf and dying shoots. Spraying is done after harvest, finishing by the end of September. Threshold: 15 feeding marks per 100 leaves.
August 27, 2026
Hazelnut Gall Midge (Mikomyia coryli): Symptoms and Spray Timing
Hazelnut gall midge: galls along the leaf veins, on the husk cluster and at shoot tips. Spray when shoots carry two leaflets, late March to early April, repeated 20 days later. Threshold 50% infestation.
August 27, 2026
Hazelnut Shot-Hole Borer (Xyleborus dispar): Symptoms, Traps and Spray Timing
Hazelnut shot-hole borer / dalkıran (Xyleborus dispar): 2 mm holes in the branch and seeping sap. When to hang red sticky traps, why the spray goes on in early July, and why whole bushes die.
August 27, 2026
Green Stink Bug on Hazelnut (Palomena prasina): Symptoms, Spray Timing and Threshold
Green stink bug (Palomena prasina) and brown marmorated stink bug on hazelnut: blank, blackened and spotted kernels. Spraying starts mid-April; threshold is 1 overwintered adult per 10 bushes.
August 27, 2026
Brown Scale on Hazelnut (Parthenolecanium corni): Symptoms, Sooty Mould and Control
Hazelnut brown scale: brown hemispherical shells on branches and shoots, sticky honeydew and sooty mould blackening. Spray at the end of June; threshold is 5 live scales on each of 30 shoots.
August 27, 2026
Hazelnut Big Bud Mite (Phytoptus avellanae): Symptoms and Spray Timing
Hazelnut big bud mite: buds swelling into galls, catkin drop and up to 70% yield loss. Spray in the one-week window at the end of April; threshold is 5 big buds per branch. Tombul is most susceptible.
August 27, 2026
Hazelnut Leaf Weevil (Anoplus roboris): Symptoms and Spray Timing
Hazelnut leaf weevil: many small holes in the leaf and tears caused by larval mines inside the tissue. Spray at the end of March; threshold is 5 adults per bush. The season's first control operation.
August 27, 2026
Cockchafer on Hazelnut (Melolontha melolontha): Root Damage and Soil Treatment
Cockchafer grubs cut hazelnut roots: first shoot tip dieback, then dieback reaching the main branches. Soil treatment from early September to mid-October; threshold 3 grubs per m². One generation every three years.
August 27, 2026
Oystershell Scale on Hazelnut (Lepidosaphes ulmi): Symptoms and Spray Timing
Oystershell scale: dark brown comma- or mussel-shaped shells on the branch. Two spray options — dormant oil in February-March or a summer spray in May. Threshold: 5 egg-bearing individuals per 10 cm of branch.
August 27, 2026
Hazelnut Longhorn Beetle (Oberea linearis): Symptoms, Spraying and Prevention
Hazelnut longhorn beetle (Oberea linearis): why shoot tips die back, and why spraying starts in mid-May. Symptoms, beat-sampling, mechanical control and how to tell it from the shot-hole borer.
August 25, 2026
Hazelnut Weevil Control Guide: Identification, Spraying and Prevention
What is the hazelnut weevil (Curculio nucum, formerly Balaninus nucum), its damage symptoms, life cycle and control methods. Spray timing and dosages.
February 26, 2026
Hazelnut Spraying Calendar: Annual Program for All Pests
Hazelnut orchard spraying calendar: spray timings, dosages and rules against all pests and diseases from February to October.
February 26, 2026
Care & Pruning
Pruning, irrigation and general care information 4 guides
Hazelnut Growing Guide: From Planting to Harvest, Step by Step
A complete guide to growing hazelnuts. Pruning, fertilization, pest control, harvest and market knowledge — everything a hazelnut grower needs on a single page.
February 26, 2026
How to Protect Hazelnut Orchards from Frost Damage
Frost protection methods for hazelnut orchards: temperature thresholds, active protection techniques, frost-resistant varieties, and cultural prevention measures.
February 28, 2026
Hazelnut Pruning Guide: Prune Correctly, Harvest More
When to prune hazelnuts, the three pruning types — formative, maintenance and rejuvenation — plus cutting technique, tools, disinfection and the mistakes that cost yield.
February 26, 2026
Hazelnut Harvest Guide: Picking, Husking and Drying
When hazelnuts are ready to pick, harvesting methods, husking and drying technique, plus harvest dates by region and correct storage.
February 26, 2026
Fertilization
Soil analysis and fertilization recommendations 16 guides
Ammonium Nitrate (33-0-0): Use, Dosage and Leaching Risk in Hazelnuts
What is ammonium nitrate fertilizer and how is it used in hazelnuts? The 16.5% ammonium + 16.5% nitrate balance, how it differs from CAN, behaviour on acid soils, nitrate leaching and dose calculation.
July 22, 2026
Ammonium Sulfate (21-0-0) Fertilizer: Use in Hazelnuts and the Acidity Risk
What is ammonium sulfate fertilizer, and when and how should it be used in hazelnut orchards? 21% nitrogen + 24% sulfur, dosage logic, soil acidification risk and a comparison with CAN.
July 22, 2026
Boron Fertilization in Hazelnuts: Blank Nuts, Dosage and Toxicity Risk
What does boron do in hazelnuts, and does a deficiency cause blank nuts? Critical boron values in soil and leaf analysis, soil and foliar application rates, and the risk of boron toxicity.
July 22, 2026
Farmyard Manure and Organic Matter in Hazelnut Orchards: Building the Foundation
What does farmyard (barn) manure do in a hazelnut orchard, what is well-rotted manure, when and how is it applied? The role of organic matter in holding water and nutrients, husk compost and common mistakes.
July 22, 2026
Zinc Sulfate (ZnSO₄) on Hazelnut: Deficiency, Dose and Timing
How do you recognise zinc deficiency in hazelnut, and when and at what rate is zinc sulfate applied to the soil or the leaf? Results from the Ordu Palaz trial and leaf-analysis critical values.
July 22, 2026
DAP Fertilizer (18-46-0): Use, Timing and Dosage in Hazelnut
What is DAP (diammonium phosphate, 18-46-0) and how is it applied in hazelnut orchards? Phosphorus fixation in acid soils, band placement, planting-hole use and how it differs from urea phosphate.
July 22, 2026
Calcium Ammonium Nitrate (CAN, 26-0-0): Use and Dosage in Hazelnuts
What is CAN fertilizer and why is it preferred for hazelnuts? 26% nitrogen, the ammonium-nitrate balance, safe use on acid soils, timing and dose calculation.
July 22, 2026
Liming Acidic Hazelnut Soils: Raising Soil pH in the Orchard
Black Sea soils are acidic by nature. Without liming, much of the fertilizer you spread never reaches the tree. How lime requirement is determined, which liming material to choose, and when and how to apply it.
July 22, 2026
Compound Fertilizer (15-15-15, 20-20-0): Use in Hazelnut Orchards
What is compound NPK fertilizer, how do 15-15-15 and 20-20-0 differ, and when does it make sense in hazelnuts? Nutrient ratios, pure-nutrient arithmetic, straight fertilizers and soil analysis.
July 22, 2026
Organomineral Fertilizer for Hazelnuts: Use, Label Reading and Application
What is organomineral fertilizer and how does it differ from chemical fertilizer and farmyard manure? When to apply it in a hazelnut orchard, what to check on the label, and an honest look at what it does and does not fix.
July 22, 2026
Urea (46-0-0) Fertilizer: When, How and How Much to Use on Hazelnuts
Urea contains 46% nitrogen and is the cheapest source of nitrogen per unit. Timing, dosage, soil incorporation and how to stop losing nitrogen to ammonia volatilization in hazelnut orchards.
July 22, 2026
Foliar Fertilization in Hazelnuts: When and How to Apply Leaf Fertilizer
What is foliar fertilization in hazelnuts, when and under what conditions is it applied? Concentration logic, leaf burn risk, phenological timing and common mistakes.
July 22, 2026
Potassium Sulfate (0-0-51) Fertilizer: Use and Dosage in Hazelnuts
What is potassium sulfate fertilizer, and when and how should it be used in hazelnuts? Learn about 51% K2O and 18% sulfur content, dosage, application timing, and important considerations.
March 10, 2026
Urea Phosphate 18-44-0 Fertilizer: Usage and Benefits in Hazelnut
What is urea phosphate 18-44-0 fertilizer and how is it used in hazelnut orchards? Application timing, dosage calculation, differences from DAP, and key considerations.
February 28, 2026
Hazelnut Fertilization Program: Annual Schedule and Application Rates
When to fertilize hazelnuts, which fertilizer types to use, and how much per decare. A practical guide to nitrogen, phosphorus, potassium and organic fertilizer applications.
February 26, 2026
Soil and Leaf Analysis Guide for Hazelnut Orchards
When to have a soil analysis done in a hazelnut orchard, how to take the sample, and how to read the results. Leaf analysis timing and method explained.
February 26, 2026
Diseases
Hazelnut diseases and treatment methods 6 guides
New Powdery Mildew (Erysiphe corylacearum): The New Threat to Hazelnuts
What is the new powdery mildew disease in hazelnuts (Erysiphe corylacearum), its differences from traditional powdery mildew and current control methods.
February 27, 2026
Hazelnut Bacterial Blight: Symptoms, Treatment and Prevention
What is hazelnut bacterial blight (Xanthomonas arboricola pv. corylina), its symptoms, spread pathways and control methods.
February 27, 2026
Hazelnut Branch Canker: Symptoms, Control and Pruning Methods
What is hazelnut branch canker (Nectria galligena), its symptoms, risk factors at high altitudes and control methods.
February 27, 2026
Hazelnut Mosaic Disease: Symptoms, Spread and Prevention Methods
What is hazelnut mosaic disease (Apple Mosaic Virus), its leaf symptoms, spread pathways and prevention methods.
February 27, 2026
Hazelnut Root Rot: Armillaria and Rosellinia Control Guide
Hazelnut root rot diseases (Armillaria mellea, Rosellinia necatrix) symptoms, identification and control methods.
February 27, 2026
Powdery Mildew in Hazelnuts: Symptoms, Control and Spraying
What is powdery mildew in hazelnuts, what are its symptoms, when should you spray and how is it controlled? Includes an overview of the new powdery mildew (Erysiphe corylacearum).
February 26, 2026
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Guides in these categories are being prepared.
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