Ive had a few problem plants, and this had led me to wonder what is causing this. Is it a nutrient problem or is there some unseen enemy that is attacking my plants?
The main symptom is a yellowing of the leaves and a loss of vigor. There are no visible insects on the plants - no scale or aphids. They are fertilised weekly with chempak.
I have 3 of these miniature pomegranates. The one pictured is particularely badly affected.
I suspect blackfly - because i can see them flying around the pots - not on the leaves though - but around the pot and soil.
My citrus also has some sticky residue on the leaves with no pests visible and this seems to be a symptom of blackfly. Ive searched the net and cant find an article on blackfly - all the articles seem to be cover greenfly, blackfly and aphids.
I dug up some soil that i was trying to grow some Chestnuts in and saw little white grubs in the soil - and there were blackflies buzzing around the pots.
I have sprayed all of them with Bayer Provado. Last year i had some scale and aphids and this product seem to sort them out very effectively. The label says that it does provide protection for some time after application as well.
As a check that it isn't a nutrient problem i have put some maxicrop on one of them.
I hope that this will go someway to restoring the plants to full strength.