This year has seen some dramatic changes to my bonsai. The most major of these was moving house and gaining some backyard space. My trees previously were kept in amongst a lush garden. On one hand this was good in that my bonsai were quite sheltered and there was a good micro climate in which to grow amongst. The down side was that I could never really rid my trees of pests as once the garden was infected everything was. As a result my trees ended up with a number of pest problems. Now I have moved I hope to rid them of these problems, which brings me to the subject of this post, my Trident Maple.
Earlier this spring I defoliated the maple and posted the results HERE. I repeated this defoliation process twice more during the season and was rewarded with much increased ramification.
As it began to change into its Autumn colours I set about doing the final defoliation. Usually I would leave the leaves on a little longer in order to see the full range of colours they would turn but I wanted to remove them before they dropped so I could dispose of them along with any insect eggs that may have been laid on them.
The trident at the beginning of autumn just beginning to show signs of it changing colour.
Starting to turn
I removed all the leaves which revealed the structure of the branches and all the new ramification. All the leaves that were removed were put into the household garbage to ensure that any eggs on them would not end up anywhere near my bonsai.
Defoliated.
Once the tree was naked I was able to carefully look over the tree to assess the amount of pruning that would be required. I wanted to spray the tree with lime sulphur to kill any remaining pests so I did not prune at this stage. I don’t like the idea of lime sulphur getting into fresh cuts. I am not sure if it is actually a problem or not but I choose to avoid it where I can.
What I did prune off was some insect eggs. I found what I first thought were fungal blooms on dead twigs.
If you look closely you can see the small white tufts of damage.
A close up of a damaged twig
Upon further investigation I realised that the tufts lead to a hollow channel within the twig which was filled with eggs around 0.5mm in size. I did a quick search on the net and realised they were the eggs of Passion Hoppers which lay their eggs in channels they make within small twigs. The twigs die soon after the eggs are laid so cutting the twig off and destroying it is a good way to tackle them.
I then went over the tree with a pair of scissors and removed every twig I could find that exhibited signs of damage.
A pile of some of the damaged twigs.
After removing what I can only guess was hundreds of insect eggs I sprayed the tree with a diluted solution of lime sulphur to prepare the bonsai for winter.
It was a satisfying days work. I hope that the work will pay off next season with a dramatic reduction of insects in my collection. Fingers crossed.
