I just discovered an additional challenge to patio container gardening on a budget -- pests and diseases! Of ocurse, I must do my own search in specialized forums and archives of information, but for now -- any idea what these are likely to be (can get photos if that helps). Is there a one-time one solution for all of these issues?
1. Nicotania sylvestris (flowering non-dwarf tobacco)
Symptom: as if something is literally cutting the leaves, especially those closest to the ground. If I separate (isolate) plants with different plants in between, much less so. This is the worst (i.e. most widespread and damaging) illness in my garden, though curiously it seems to affect the tobacco almost entirely and ignoring the mints and nettles. However, today I noticed even a few tiny holes in the leaves of my lovage. Unrelated? The tobacco has something that seems to make a journey across the whole leaf destroying it in a straight line.
2. Helianthis annus, var. (sunflower, var. dwarf sunspot)
Symptom: top leaves curl upon themselves. The tall Pederovik variety all died after growing at first as if they were on plant testosterone.
3.Achillea millefolium (yes, the wild variety of yarrow)
Symptom: feathery leaves turn purple-red, some die
4. Nepata cataria (catnip)
Symptom: as #3, stems too in this case except none die
Pests, disease, soil acidity, sun? This is all so complicated! Next year I will be doing urban and forest foraging for simplicity! In the wild plants are robust, tall and it appears, disease-free. Or perhaps I just don't see those that have died?
What resource (book or online) do you find to be most helpful in lokking up diseases for particular plants or by symptom?