Lovely but nasty.

 Today I'm going to talk to you about what I call a "lovely but nasty" bug : the Rosemary Beetle (Chrysolina americana).

Rosemary Leaf Beetle - Picture : web

Lovely indeed : look at those magnificent metallised little bugs. Aren't they cute?! They are 8mm long and have metallic green wings with iridescent purple lines.

But nasty : they will devour your rosemary leaves in a heartbeat. And then your lavender, your thyme and your sage too.
Their larvae are grey with darker stripes and are up to 8mm in length.

They were first spotted in England at Wisley Garden, Surrey, in 1994, but didn't became a problem before 2005 when they decided to widespread across the south-east part of England. They now are one of the top 10 most frequent pest enquiries made to the RHS Members’ Advisory Service !

The adults start to be particulary active on their host plants during late August and September : they feed, mate and lay eggs until next spring. The eggs hatch within two weeks and the larvae feed for three weeks before entering the soil to pupate. The pupal stage lasts for two to three weeks before adults emerge.
And then the cycle begins again! 

Rosemary Beetle - Picture : web

There are different ways of getting rid of them :

• You can handpick them and ... well ... you know... dispose of them. The best time to do it is before the end of summer.

Here's a good tip from the RHS (Royal Horticultural Society) : open upside down an umbrella under the branches and tap the plants to dislodge the insects.

• You can use a homemade solution made of 1/3 of soap and 2/3 lemon juice that you spray on the little devils.
• You can use pyrethrum-based insecticides. But, as you usually find these insects on aromatic herbs (rosemary, sage, thyme,...), it's best to avoid insecticides and stick to the lemon juice/soap solution. If you really want to apply insecticides, you should not do it when plants are in bloom as these are harmful to bees and others pollinating wildlife.

One last thing : be sure that you're dealing with the Rosemary Beetle ! Its cousin, Chrysolina cerealis or Rainbow leaf beetle, is quite similar BUT it's a protected specie in the UK.

Chrysolina cerealis - Picture : Michel Ehrhardt

How to differenciate them? The green part of the Rosemary beetle's wings are "hammered". 



So keep your eyes open and if required, use your umbrella (once again!).

A new beginning...

Here we go!!!
My first post on Wild Garden's Notebook.
I don't really know how or where to start so maybe we should just have a look on what we can do this weekend in the garden (between two showers!)


The last couple of weekends weren't the most sunniest England has seen. This weekend won't be really better. A little bird told me we might even see thunder over London and maybe hail.
On the bright side, Sunday's weather should be more enjoyable.
To make the most of it, here are some advices on what you can do in your garden :

• Now is a good time to trim box hedges. It's better to do it on a cloudy day (lucky us!) and, if possible, in the morning. This way your cuts won't be scorched by the sun.
• If you want to trim your hedges this weekend, please take care that there is no bird nests hidden inside. 
• Keep an eye on your plants for pests. Search for this bug on your aromatic plant : Chrysolina americana or Rosemary Beetle. I know, I know they are beautiful little metallised beetles. BUT they will devour your rosemary and your lavender without any hesitation. Have look here for a more detailed post on this lovely but nasty bug.



Chrysolina americana - RHS website

• You can cut back Geranium phaeum and Geranium sylvaticum to encourage new shoots and maybe new flowers.
  
• Keep deadheading roses to prolong flowering.

In your vegetable plot, it's time to :

• Take good care of your tomatoes plants : feed them once every two weeks with a liquid fertiliser, tie them to a support, pinch out side shoots.
• Saw new rows of radishes and salad leaves every week to ensure harvests all summer long.

• Keep watering (if it's not raining enough of course!)

 Finally, if you're feeling like going out, I recommend a little trip to the Queen Elizabeth Hall Roof Garden, near Southbank Center. Until September, you can visit this garden created in partnership with the Eden Project in Cornwall. Combining an orchard, a lawn, a wildflower area and vegetable plots, this rooftop garden is a great place to sit and relax. 
Have a look at Southbank Center website for more details.



Enjoy your weekend and happy Father's Day to all the daddies !