Showing posts with label Delia radicum brassicae. Show all posts
Showing posts with label Delia radicum brassicae. Show all posts

Tuesday, 6 March 2012

Late winter jobs.

I have sown some more celery and celeriac.  The celeriac did not germinate very well  and I have only a few from the first sowing.  I hope that these ones come because I do not have any more.

I have transplanted all the tomatoes, leeks, onions, cauliflowers, cabbages and celery into pots of their own now.  This will enable them to grow on in the pots and I will not have to plant them out until the weather becomes more clement.  I have sown some first early peas in sectioned trays using a pinch of mychorrhizal fungi in each of the planting holes.  These peas will start the succession of peas throughout the spring and summer.  I usually plant four rows of peas more or less at the same time because they all come at the same time no matter when I plant them.  I have never planted peas this early though so I may well get a difference in cropping time especially as I am using four different varieties this year.  I transplanted another tray of lettuce and used mychorrhizal fungi in the planting holes again.

I have finished the Hugelkultur trench for the climbing French beans.  This time I layered weed turfs, holly branches and brushwood, leaves and turfs, putting sieved soil and manure mix on top.  It made very friable soil.  I used the rake to level off the ground as much as I could but their will be a mound there for the rest of the season. It will slowly go down as the organic matter decomposes.  The ground around the winter cauliflowers was tidied a little because there were a lot of dead leaves on the ground.  The old red Brussel sprouts were harvested and taken out.  I put them into a plastic bag so that I could bring them home and put them into the green bin.  There was no disease on them at all but it is best to be safe especially as they could be harboring club root.

I thought that I had club root in the ground again last year but, looking at the roots, I think that  they were probably damaged by cabbage root fly.  I don't usually have any trouble with cabbage root fly Delia radicum brassicae.

I am still cropping the allotment and took some purple sprouting broccoli home today.  I still have some parsnips, carrots, leeks and celeriac to crop.  Later on in April I will have the winter cauliflowers developing.

Six of the sweet pea support posts were put up today.  I have put cross pieces at the top of the poles to enable me to keep the canes horizontal.  I may have to change their position because they may be too close together and I can use the trackway to get to the plants so I don't really need to leave a path on the allotment as well.

Once all the posts for the sweet peas are in, I will need to get on with putting the roofing felt onto the sheds.  The store shed is the worst; letting in a lot of rain.

Thursday, 2 June 2011

Using barriers to keep pests off vegetables.

I  had covered the brassicas with netting to keep the pigeons off them.  The netting was not fine enough to efficiently prevent cabbage white butterflies Pieris brassicae  getting to the plants but I know that some people are using scaffold netting to do this job.  They use water pipe to form hoops to put the netting over and keep the net off the plants.  Both cabbage butterflies and cabbage root fly Delia radicum would be excluded from the plants.


Although this is a very effective method of pest control, I cannot be bothered with doing it.    I would rather be able to get to the plants to see how they are getting on.  I also like to hoe up the brassicae plants.  I do this for two reasons.  The first is to help to prevent cabbage root fly from laying eggs near the stems. The second reason is to encourage root production from the stems.  This will help in stabilising the plant when it gets bigger.  


Today, I took off the final net covering the brassicas.  When the cabbage white butterfly begins to lay eggs and the caterpillars start to hatch out, hopefully I will be able to remove them by gloved hand.  I have done this successfully for a couple of years now.  


I planted some radish and some rocket in the brassicae bed between the other plants.  They will be cropped long before the big brassicas overshadow them.  


I took down the netting from  around the runner beans.  This netting was not being used as a pest barrier but rather a wind break.  The runner bean plants seem to appreciate being out of a cold wind early in the season.  Most of my runner beans are Aintree.  It is a particularly early one and it has already gone up the supporting canes about 600mm.  I gave them a weeding and watering today.  


Now we had to make a decision about the onions.  I have been using plastic cloches to keep the onion miner fly Phytomyza gymnostoma off the onions and I had been advised that it was fine to remove the barriers now.  It took a lot of effort to convince myself but I did take the cloches off and put them away.  I watered the onions with a good dose of diluted comfrey liquid and they seem to be doing all right.  


I will be putting the cloches and enviromesh back onto the leeks around the end of July as a barrier because Phytomyza gymnostoma has a second generation in late summer.  While the larva are eating other people's onions and pupating, I will have a respite and the onions will be able to develop without protection - or that is the theory anyway.  


I hate having to protect the onions and leeks.  These are the two vegetables that rarely had any problems at all in the olden days and could be left to fare for themselves during the summer.  


I do not take off the enviromesh covering the carrots.  After thinning them out on Tuesday, it was too much of a risk to leave them exposed.  It seems that the carrot root fly Psila rosae does not have a dormant period as far as I have experienced.  So I leave the barrier on all season.  Weeding and thinning is a faff but worth while when you see the lovely carrots that you have produced under the netting.  


I sowed more Hamburg parsley and spinach.  I made a drill with the back of the rake then watered it with dilute comfrey liquid.  A little mychorrhizal fungi spores were put at the bottom of the drill and the seeds were sown on top.  The soil was carefully replaced using the rake and tamped down gently.  I like to water the seeds immediately after sowing and then regularly until they germinate.  


I am getting about a kilo of strawberries off the plants every time I pick them.  Maybe five 25 foot rows is a little excessive but I do like strawberries.  


I keep taking the immature Webb's Wonderful lettuce for salad leaves.  As I have taken out the rocket I cannot add these to the leaves but I am using the spinach instead.  


I have been given 6 beefsteak tomatoes by Fred.  I have bought four of them home to put into the greenhouse but two are in pots on the allotment.  I used Fred's home made compost to plant them in putting in mychorrhizal fungi next to the roots.  These outdoor plants will probably get blight before they fruit heavily but the ones in the greenhouse will compensate - hopefully.


I took another crop of sweet cicely and put it into the comfrey bins.  Hopefully this will add to the potency of the comfrey liquid.  It certainly seems to be doing everything good.  Have a look at the photographs for the end of May.