What's your question? Ask

Rainfall can effect the Neem Oil, but in most cases the application that you apply has all ready began to effect the sucking or chewing insects.
It's best to apply Neem Oil in the morning so the Neem Oil can dry before the good insects become active.
Avoid the times of day when beneficial insects are active, though Neem Oil is safe for them, they can still be smothered if drenched in Neem Oil.

Neem Oil also works systemically.
Here is a link with more information.

https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm

The night is filled with critters big and small that may have been rumbling around your garden.

By this time of the Spring they are quite active and generally searching for food and such after a long winter.

https://www.gardeningknowhow.com/houseplants/hpgen/mice-digging-up-houseplants.htm

This article will give you ideas on how to deal with those pesky critters:
https://www.gardeningknowhow.com/plant-problems/pests/animals/get-rid-squirrels.htm

This article has additional ideas:
http://homeguides.sfgate.com/can-use-discourage-squirrels-eating-hibiscus-plants-46102.html

Good luck!

For more information about growing Gunnera, please visit the following link:
https://www.gardeningknowhow.com/ornamental/foliage/gunnera/growing-gunnera-plants.htm

Here is an article that will help you.
https://www.gardeningknowhow.com/edible/fruits/avocado/avocado-pests-and-diseases.htm

It is most likely the Sweet Potato Looper.
Bt is effective against this common caterpillar.

https://www.gardeningknowhow.com/plant-problems/pests/pesticides/using-bacillus-thuringiensis.htm

There are many ways to make insecticidal soap but I am going to assume you made the one using the recipe on our website (one cup of oil with a tablespoon of dishwashing liquid). If this is the case, you can simply store it in a large lidded glass jar in a cool place.