It has been a tense few weeks here as we watched our two avocado plants that I've been growing for the past year slowly loose all their leaves.
I sprayed them with some non-toxic bug killer to no avail.
Then I decided to do some online searching to find out what might be killing our beautiful friends. I finally discovered that they had fungus bugs eating their roots. Many of the sites said too bad the plants will die or to use lots of chemicals but one gave some helpful advice: stop watering the plants and let the soil dry out. Apparently the fungus bugs need moisture to survive and with no water the bugs will die but the plants will be fine. Once the soil is completely and utterly dry, you can start to water again, watching carefully for bug-action.
Today our second avocado lost its last large leaf. So both plants have are now stick-like and at first glance leaf-less!
However, both have started to sprout new leaves this week! Hurrah!
I like to think that the little pep-talk I have with them every morning about them being such lovely plants and how much we want them to thrive has also helped. So yes, you should talk to your plants and tell them that they are great! (but also do some research on bugs!)