I have several tent caterpillar nests around my house. Some I can reach to get rid of. There are others nested too high in the trees; therefore, I can't reach then. For the high nested ones, if I use a long stick and poke a hole in the nest letting the eggs drop to the ground, can that be a solution or will the eggs grow into caterpillars when on the ground?
This article will help: https://www.gardeningknowhow.com/problems/pests/tent-worms-tent-caterpillar-home-remedy.htm
Will ash from my wood burner kill grub worms?
Not too sure about that, but this article will help: https://www.gardeningknowhow.com/plant-problems/pests/lawn-grubs-how-to-get-rid-of-grub-worms.htm
How can I be sure that I have aphids and not some other critter?
They will look like small dots, typically on the back of the leaves of the plant, but it can be on the stems too. I like neem oil for treating aphids. These articles will help you:
https://www.gardeningknowhow.com/plant-problems/pests/homemade-aphid-control-a-natural-way-to-kill-aphids.htm
https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
I have a leafy tree that has been attacked by bagworms. The bark of the tree has been somewhat damaged. How can I get rid of the bagworms and save the tree?
Bagworms are difficult to control because they are often unnoticed until mature. If numbers are low, they can be picked off in late fall. Bacillus thuringiensis (Bt) is effective against bagworms if it is used against young larvae. Applications should be made at the end of June after all the eggs have hatched.
Is there a homemade spray for the white cabbage butterfly?
This article will help: https://www.gardeningknowhow.com/edible/vegetables/broccoli/worms-in-broccoli-caterpillars-in-the-broccoli-head.htm
How can I identify and treat spider-mites?
These articles will help: https://www.gardeningknowhow.com/plant-problems/pests/spider-mite-detection-and-spider-mite-natural-control.htm
https://www.gardeningknowhow.com/plant-problems/pests/insects/red-spider-mites.htm
You can also treat them with neem oil. Here is more info: https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm
I have a slug infestation that I have almost cured with pellets, but in the last two days have noticed what appear to be clusters of bubbles on the plant that suffered the worst from the slugs. Is this the plant or another infestation of some kind?
I cannot be sure, but this article will help with the slug problem: https://www.gardeningknowhow.com/plant-problems/pests/facts-about-slugs-and-how-to-kill-garden-slugs.htm