Peacock spot, cercospora, anthracnose, dalmatian disease, verticillium wilt, olive knot, Xylella, and the pests: olive fly, olive moth, psyllid, Pollinia, jasmine moth, black scale. A tool that compares field symptoms against the profile of each cause, with photographs and the one feature that separates them.
Chilling Hours, Utah Chill Units or Dynamic Chill Portions, what each measures, which suits which climate and season, why a chill portion does not convert into hours, and how the divergence between the three is read. The calculation itself lives in a separate tool.
Chilling hours, Utah units or Dynamic portions, three different quantities that do not compare. How much chilling each cultivar needs, what the dormancy-breaker trials actually show, the 70% rule, and what is permitted on cherry in Greece.
Flowering is decided in June and July of the previous year. What is inside the bud, why the first five nodes do not count, the confusion between chilling hours and chilling units, and how the annual 120-day emergency authorisation actually works.
The chemistry, the mode of action and the eight authorised uses in Greece with the official rates. Where the phytotoxicity limits are, what the studies show about beneficials, and why contact with acids is the gravest hazard.
Fungi, oomycetes, bacteria, phytoplasmas, viruses and viroids, organised the way they are diagnosed. Where the symptom starts, how it spreads, and what the stem cut shows - with an explicit field and greenhouse distinction.
The eight modern systems of PNW 667 with spacings and year-by-year steps, the classical Greek forms, and what the comparative trials in Italy, Tasmania and Turkiye showed, including where the Greek guide and the international literature openly disagree.
A yellow leaf does not say which element is missing. The mobility rule, the three exceptions that break it in fruit trees, a tool that ranks hypotheses from the position and form of the symptom, and why for iron the leaf analysis does not work.
Hundreds of products appear with a past approval date and no withdrawal recorded. The European regulation expressly provides for the authorisation to be extended while renewal is pending. When expiry is an administrative milestone and when it is a real end, what the grace period limits are, why emergency authorisations are a different matter, and the practical checklist before every application.
Calcium moves only in the xylem, and the pathway closes before ripening, which is why late sprays cannot work. Thresholds, cracking, hydro-cooling, and the dose that reverses.
The arrow diagram in every fertiliser leaflet does not stand up scientifically. The antagonisms are real, but they act on two separate levels, in the soil and inside the plant, and the same element can be antagonistic on one and synergistic on the other. With a tool showing the documented relationships of each element.
It is a cation exchanger, it holds ammonium and potassium, not nitrate. The rates that work are tens of tonnes per hectare, not hundreds of kilos. And erionite is a Group 1 carcinogen.
