Plants
| Page | Yellowing leaves | Spots on leaves | Curled or distorted leaves | White or powdery coating | Sticky leaves or black film | Holes and chewed leaves | Insects you can see | Wilting or dying back | Stems and canes | Fruit, pods and tubers |
|---|---|---|---|---|---|---|---|---|---|---|
| Tomato | 5 | 3 | 4 | · | · | 2 | · | 3 | · | 3 |
| Rose | 2 | 3 | · | 2 | 1 | 3 | 3 | 1 | 5 | · |
| Squash and zucchini | 2 | 3 | 1 | 1 | 1 | 1 | 3 | 3 | 1 | 2 |
| Strawberry | 2 | 4 | 1 | · | · | · | · | 3 | 1 | 2 |
| Cucumber | 1 | 3 | 3 | 2 | 1 | 1 | 2 | 1 | 1 | 4 |
| Potato | 2 | · | 1 | · | · | · | 2 | 2 | 1 | 4 |
| Beans | 2 | 4 | 1 | 1 | · | 2 | 4 | 2 | 1 | 1 |
Pests and diseases
| Page | Yellowing leaves | Spots on leaves | Curled or distorted leaves | White or powdery coating | Sticky leaves or black film | Holes and chewed leaves | Insects you can see | Wilting or dying back | Stems and canes | Fruit, pods and tubers |
|---|---|---|---|---|---|---|---|---|---|---|
| Scale insects | 2 | · | · | · | 1 | · | 3 | 2 | 2 | · |
| Aphids | · | · | 1 | · | 2 | · | 2 | 1 | · | · |
| Spider mites | 2 | 2 | · | · | · | · | 3 | 3 | · | · |
| Powdery mildew | 3 | 1 | 1 | 3 | · | · | · | 1 | 1 | 1 |
| Leaf spots | 1 | 10 | · | · | · | · | · | · | 1 | 2 |
Numbers in the grid are how many possible causes the chart lists for that symptom.
How to read a row. Every line starts with the name of the Extension service that said it and ends with a link to their page and the date we last checked it. Where one service describes a cause and another does not, the empty cell says so instead of filling the gap.
We only cover how to recognize a problem. Treatment advice stays on the Extension pages, where it is written for their region. See how we check each line.