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• Olive peacock spot: symptoms and a region-by-region spray calendar

  The commonest of olive tree diseases: concentric rings on the leaf, shedding, a shrubby tree. Yield falls 20-25%; spray timing varies by region.

  … dark spots in **concentric rings** on your olive leaves, the tree has peacock spot (*Spilocaea oleagina*). Türkiye's technical instruction ranks it, alongside the olive fruit fly, …

• What to do for olive trees after harvest: a November-to-March care guide

  The work in the grove does not end with the olive harvest; next year's crop is prepared in exactly these months. From collecting fallen fruit and protecting harvest wounds to region-specific peacock spot sprays, the right pruning time, autumn feeding and winter soil work, here is what needs doing after harvest.

  … Peacock spot sprays: by region **Peacock spot** is a fungal disease that forms ring-shaped spots on leaves, causes leaf drop and therefore yield loss. It becomes …

• The olive pest calendar and intervention thresholds

  Month by month: which pest is at which stage, and when to count. Fly infestation thresholds, black scale shoot counts, and the three regional programmes for peacock spot.

  … (late February)Finish pruning; remove knotted branches MarchSoil warming; fly adults preparing to emergePeacock spot spray before spring shoots (Aegean/Mediterranean) AprilMoth's flower generation in the budsInspect flower …

• Mut Olive Oil: a landscape that needs no pesticide

  The certificate's real claim rests on altitude and humidity: 10-40% relative humidity keeps out both the olive fly and peacock spot. That is why organic production is straightforward here.

  … world olive growing — **the olive fly, the olive moth and peacock spot** — are absent here. On peacock spot the certificate is even more definite: …

• Why is my olive tree not bearing fruit? 9 causes and what to do

  Behind an olive tree that flowers but sets no fruit, fills one year and stays empty the next, or has never cropped at all, there is usually more than one cause. From the tree's age and lack of grafting to missing pollinators, insufficient chilling, drought and the wrong fertiliser or pruning, here is how to diagnose by symptom and what to do.

  … - Trees hit by **frost damage** may also fail to crop for a year or two. ## Quick diagnosis by symptom No fruit: symptom and likely …

• Olive fruit fly warning before harvest in Aydın: check groves, spray only above the threshold

  The Didim District Directorate of Agriculture and Forestry, together with the Aydın Provincial Directorate, has warned growers about the olive fruit fly ahead of the harvest. Growers were asked to check groves regularly, monitor pest density and, if needed, act only with products licensed for olives and at the right time. Fly pressure rising in autumn cuts both yield and oil quality.

  … in groves where picking was finished. We cover the symptoms and control of that disease on our [olive peacock spot](/en/olive-peacock-spot-disease) page. If you want to know …

• Xylella has left Puglia: seven olive trees test positive in Calabria

  The pauca subspecies of Xylella fastidiosa, which dries out olive trees, had been confined to Puglia since 2013. In Taurianova, Calabria, 7 of 35 samples tested positive; the region issued a quarantine decree on 1 September with a 2.5 km buffer zone.

  … is **a single outbreak**. Surveys in the buffer zone are continuing and the number of positives may change. ⚠ Other Xylella subspecies had already been found …

• Choosing certified olive saplings: labels, documents and variety

  Label colour shows the certificate class: blue certified, yellow standard. The difference is traceability, not quality. The support gap is 930 lira per decare. Four questions that settle variety choice.

  … thrown many shoots from the base complicates training. **Health.** Do not buy saplings with peacock spot lesions on the leaves or knots on the branches. A …

• Olive Pruning: Why, When and How

  Why olives are pruned, when to do it, formative and production pruning, rejuvenation and high-density systems.

  … keeps leaf surfaces wet for longer. Prolonged leaf wetness is a direct invitation to peacock spot (*Spilocaea oleagina*) and to olive knot. - **Renewal.** A fruiting …

• Weeds in the olive grove: bare soil is not the goal

  Johnson grass, Bermuda grass and fat hen. With perennials, ill-timed tillage spreads them while mowing stops the seed. Clean under the canopy, covered between rows.

  … raise humidity under the canopy and set the stage for **anthracnose** and peacock spot, they shelter pests, and they make harvest and machinery access harder. But …

• Organic olive growing: what a four-year trial found

  A four-year organic vs conventional trial at Kemalpaşa: no yield difference, 11.5% higher gross margin for organic, lower peroxide value, but higher fruit oil content under conventional management.

  … four years**, so no treatment was applied against it at all. Peacock spot, olive knot and verticillium were also monitored but caused no damage, so nothing …

• Other olive pests: jasmine moth, psyllid and olive scale

  Three olive pests overshadowed by the fruit fly: the jasmine moth on tender shoots, the cottony psyllid, and olive scale.

  … Related reading: [Olive fruit fly control](/en/olive-fruit-fly-control) · [The olive moth](/en/olive-moth-three-generations) · [Olive black scale and sooty mould](/en/olive-black-scale-and-sooty-mould) · [Olive peacock spot](/en/olive-peacock-spot-disease)

• Olive knot: galls, warts and a bacterium that enters through wounds

  The bacterial canker among olive tree diseases that enters through wounds: galls and warts. Pole harvest and pruning errors spread it.

  … spring rain (**1%**), before autumn rain. ## Source > Republic of Türkiye, Ministry of Agriculture and Forestry, General Directorate of Agricultural Research and Policies, Department of …

• Verticillium wilt: the disease that kills the tree and has no cure

  The olive tree disease that kills: it survives over 10 years in the soil, blocks the vessels, and has no effective chemical control.

  … grow **cereals for two years** first. - ⚠ **No intercropping**, no flood irrigation, no excess nitrogen. - ⚠⚠ **There is no effective chemical control.** Prevention is …

• The olive moth: three generations, three kinds of damage

  The olive pest with three generations: it winters in the leaf, eats the flowers, enters the fruit. One larva can take 30-40 buds.

  … 2022. Related reading: [Olive fruit fly control](/en/olive-fruit-fly-control) · [Olive peacock spot](/en/olive-peacock-spot-disease) · [The olive harvest: when and how](/en/the-olive-harvest-when-and-how)

• The Olive Tree

  Olea europaea: botany, lifespan, root and leaf structure, monumental trees. The identity of the Mediterranean's emblematic tree and how it lives.

  … [olive varieties](/en/olive-varieties). **Leaves.** Leaves from pruning are dried and used as tea; what the evidence supports is discussed in [olive leaf tea](/en/olive-leaf-tea-how-to-make-it-and-what-the-evidence-says). **Wood.** Hard, heavy and …