Is it late blight? Flip the leaf and look for this

Potato Late Blight: How to Recognise It, Prevent It and Control It by FRAC Group

Late blight (Phytophthora infestans) caused the Irish potato famine and is still one of the most damaging diseases of potato and tomato worldwide. How to recognise it on leaves, stems, tubers and fruit, tell it from early blight, read blight weather, find where infection comes from, prevent it, choose fungicides by FRAC group with resistance management, and protect tubers at harvest and in store.

Aphids: How to Identify Them and Control Them by IRAC Group (Without Making It Worse)

Aphids are on almost every crop in the world. How to recognise an aphid in seconds, tell it from whiteflies, mealybugs and thrips, why colonies double in days, the three kinds of damage including virus transmission, scouting and action thresholds, the natural enemies that control aphids for free, cultural control before spraying, and choosing insecticides by IRAC group to slow resistance.

How to Sow Wheat: Sowing Date, Seed Rate Formula, Depth & the First 3 Weeks

Most of a wheat crop's yield is decided in its first few weeks. This step-by-step guide covers the sowing window for winter and spring wheat, seedbed or zero-till drilling, seed testing and treatment, the seed rate formula with a worked example, sowing depth and spacing, phosphorus and split nitrogen, the first irrigation, weed control from sowing day, and how to count plants three weeks later.

The #1 wheat sowing mistake (it is not the seed)

Is it really an aphid? Look for the two tailpipes

Why Are My Tomato Leaves Turning Yellow? 7 Causes and How to Fix Each

Yellow leaves on a tomato plant can mean anything from "completely normal" to a soil-borne disease. This video walks through the 7 most common causes, how to tell them apart from the leaf itself, and what to do about each one.

Yellow tomato leaves? 7 causes in 35 seconds