June 1, 2012
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Peach leaf curl
If you grow peaches, nectarines and apricots, this is the main problem. It can be avoided bycovering your peach tree or your apricot tree with a double layer of garden fleece from late January until the middle of May, every year.
Peach leaf curl disease is caused by a fungus, Taphrina deformans. It will attack the tree species of peach, nectarine and apricot. The symptoms are the development of large reddish blisters on the leaves. The tree is seriously weakened as photosynthesis bythe leaves is seriously affected. Eventually the tree is starved to death as it is no longer able to make essential carbohydrates, through photosynthesis. Leaves tend to fall prematurely and growth comes to a complete standstill.
The fungus attacks the tree from late January until the middle of May. After May the fungus is no longer producing spores and therefore cannot cause new infections.
How to avoid these troubles
Actions to be taken immediately are the complete removal of leaves affected. This applies to the fallen leaves as well as the affected leaves still attached to the tree. Make sure the leaves are all collected up, put in a plastic bag and then put in the non-recycling bin. The fungal spores survive over winter on the fallen leaves!
Make sure the tree is well watered and does not stand in a carpet of weeds and grass. Apply a full watering can of water twice a week, particularly during the summer months. Mulch the tree with well rotted farmyard manure. The area to be mulched must be of a minimum size of one square yard.
Never let the tree go short of water! By late January cover the tree with a double layer of garden fleece. Fasten the fleece securely. Make sure the wind cannot affect it or lift it off. Keep your eye on the tree and if a tear develops in the fleece after particularly bad weather, repair the damage properly. This fleece needs to stay in position until the second week of May. After that time, carefully remove the fleece.
Never prune the tree during the autumn and winter months when the leaves have fallen. It is at that time that new infections occur very quickly. Prune during the middle of May or during late August, making sure that the old wood is removed to make room for new shoots to form. This is essential as the fruits of peach and nectarine are formed on one year wood only. Seal the pruning cuts with “Prune and Seal”, a compound available from your garden centre. The foliage of a well pruned tree dries up quickly, with less chance of new infections.
January 27, 2011
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A good crop on a well-tended apple tree
There is a lot of confusion around the topic about which is the best time to plant. Many people believe that March to May is the best time to plant. In fact in most cases it is the opposite! By far the best time to plant trees is in the period from early December to the middle of March. And in that period it is most important to choose the right moment to plant, soil wise and weather wise. It is a mistake to delay the planting to the last moment. The weather is very variable and unpredictable. The best way of doing it is to have the trees on site, from early January onwards. When you receive the trees, heel them in, near the house, in a trench 8 inches wide and 8 inches deep, cover the roots totally with soil, and leave them until that moment when weather and time are opportune for planting. These moments of ideal planting conditions may only last for a day. If the trees are on the site one can make use of these ideal opportunities , which occur spasmodically during the winter months.
Now, why is it so important to plant early? It is a mistake to think that when the trees are put in the soil they start to grow from that moment. Trees need time to adjust and closely associate with the soil, in order to rebuild the micro-feeding roots. This process can take as much as from 3 weeks to a month, depending on soil temperature. Without these roots being functional, the trees are totally dependent on the reserves stored in the thicker roots and in the woody parts of the tree above ground . Once those reserved are used up, the tree, if not planted early enough, starves, and will look miserable for the rest of the season.
Finally, don’t put big lumps of soil on top of the tree roots. Micro roots cannot grow in this. Instead, visit your garden centre, and buy some of the best tree planting compost such as John Innes compost number three. Cover all the roots with it, move the tree gently up and down to enable the crumbly soil to filter in between the roots, then secure the tree to the stake or the wire or the fence and make sure the union of the tree is 5 cm above the soil. Apply a mulch around the tree and water weekly with 5 litres of water once growth has begun around April time.