Once again I seek your advice concerning high-bush blueberry. I have found the same features on non-problematic bushes that were on problematic ones at the very beginning. Pictures are attached. High-bush blueberry black leaf Moreover, I have found black leaves on one Jersey blueberry bush. Some leaves are black on the one side only, the others – on both sides.
And one more question. The trunks of some bushes grow horizontally. Should I forcibly lift them vertically or let them grow as they are? One last thing. I have found a new sprout in one pit (see the picture of the circled red ellipse).
Click the picture to enlarge. I cannot understand whether it is a blueberry sprout or some tree has penetrated from below through the coating and acid soil? The planting site of the blueberry bushes had thickets of young plum, cherry and maple. I tried to remove the roots, but, perhaps, I failed to remove all the roots during the pitting.
Thanks in advance for your answers. Sincerely, Andrey Kulyatin. Hello, Andrey Yurevich
The first thing you should do is to treat your blueberry bushes not only by fungicides such as Skor, Topsin M or Fundazol, but also by insecticides, because some of your pictures show leaf stripping. You can use Fufanon, Aktar, Detsis, Karate, or any bacterial preparations against insects permitted in EU and USA, such as Fitoverm. Do not apply nitrogen fertilizers after midsummer. You can use copper products (copper sulphate, copper oxychloride) in the spring.
Black spots on blueberry leaves are very similar to dark mildew – a fungus disease that can be treated by the same fungicides. In general, the disease gives “cosmetic” inconvenience to your bushes. You can treat the leaf spots in the same way.
Judging by your pictures, the general status of your bushes for the first year is very good – there is a pronounced growth, leaves are well developed. The degree of blueberry fungus diseases is negligible – I would say even very low. Considering the fact that during the first year or first two years plants are adapting after planting, I dare to hope that when they take good roots, then many problems will disappear by their own.
Regarding the horizontal lying sprouts – at the moment, leave them in their original way: new vertical sprouts that will form the bush crown will come out of the ground next spring (and if you heel-in your procumbent blueberry sprouts in those places where they are tangent to soil, then you will be able to get your young plants – root layers).
Judging by the pictures, the unknown bush is not a plum, cherry or maple. It is cowberry. There are two main versions of how it got on your site:
1) They are often grown on adjacent seedbeds in nursery-gardens, because they both require the same soil conditions. Thus, cowberry sprouts could easily move to the adjacent seedbeds and then come to you together with the blueberry ones.
2) Cowberry got to you together with the needle litter from the wood or peat. Anyhow, it’s up to you to decide what to do with it – replant or remove from your garden.