Lemon Leaves Curling And Turning Yellow Mesa AZ
The Asian Citrus Leaf Miner
Tree Disease Basics playlist
Whiteflies in Temp AZ
Citrus leaves can curl when temperatures are cold or in extreme heat, some insect infestations such as scale, mealy bug, mites or aphids will cause leaves to curl and over-watering. Other times it is leaf curl disease.
Some varieties are more susceptible to leaf curl disease than others. Leaf curl overwinters in buds of infected trees. A copper based clean up spray is the most effective way of controlling leaf curl. Spray in autumn/winter using a copper fungicide and oil just after pruning until bud burst in spring at 10-14 day intervals. Collect up any infected leaves that fall and burn or dispose of, do not compost as this will spread the disease.
Adjust watering depending upon the weather. If it is heat, apply Tui Organic Seaweed Plant Tonic regularly and keep it well watered. Also apply Tui Organic Seaweed Plant Tonic regularly if cold, however watch the watering and make sure not to over-water it. Feed with Tui Citrus Food or Tui NovaTec Premium fertilizer (suitable for pots and containers). However in frost prone areas avoid feeding any later than mid-February as this will push soft new growth that will frost easily and won’t have had time to harden off
Another insect to be concerned with is the Asian citrus leaf miner.Arriving here in 2011 and breeding up to 15 times a year, the Asian Citrus Leaf Miner was in every citrus tree I looked at for several years.
The population grew unchecked well into the summer of 2019,. So for at least 8 years, the leaves on your citrus trees have been producing far less energy than normal.
Because of this the reserve cells are dangerously low. Biologically speaking, your citrus trees have run out of gas.
Because it has no natural predator in Arizona there was nothing to keep it in check. However now it competes with the Ash Whitefly.
It takes years but eventually a citrus trees reserves will be drained to the point that it can no longer defend itself against any insects or soil born fungus.
That’s where we come in, if it’s not too late we can get you started on a program to restore the energy reserves of your trees.
Watch the videos on this page to learn more.