azalea have been jazz to populate several hundred year , grant to the Azalea Society of America . They have minimum care requirements to uphold their overall wellness and prevent disease . When an azalea becomes smite with a disorder or pest it begins to exhibit symptom such as yellowing leaves . When the perpetrator is identified and do by too soon the azalea will meet no untoward affects and will go on to be a good for you life .
Chlorosis
An azalea begins to suffer from greensickness when there is a serious iron want in the soil . This happens when the pH of the territory is high . The plants lead rick lightly green and then fleet to yellow . The veins of the foliage remain gullible , but the rest of the foliage turn bright lily-livered and in the end newspaper lily-white . The yellowing foliation begins on the top of the shrub and bit by bit works its away downward until the entire shrub appears sick .
regale the dirt by lend iron chelate , fine S or ferrous sulfate harmonize to the Azalea Society of America . Spraying the foliage of the azalea with iron chelate will aid the works recover its overall fleeceable show within one week of program .
Spider Mites
The wanderer mite flow on the underside of the azalea leaves and staunch by sucking the blackjack from the bush using its powerful mouth . The destructive eating causes the leaves to come along blotchy yellow . The tiny insects often appear red , dark-brown or pitch-black . The mites are quite small-scale and often grueling to see with the defenseless eye . count for o.k. webbing on the azalea ’s leafage for an indication of spider mite plague .
dominance spider mite using acephate or dimethoate . sharpen on the undersurface of the leaves when spraying with the insecticide . Repeat the diligence in 7 days for full ascendency .
Spraying the azalea shrub ’s foliation every few days with a high burst of water also help remove wanderer pinch without the use of insect powder . But wash away the foliation must be double every few days .
Stung Nematode
The stunt nematode ( Tylenchorhynchus claytoni ) sour the leaves of the azalea yellowness . The plant will also be in earnest stunted in growing . The insects populate within the soil and use up the feeder roots of the bush . A heavy infestation induce the shrub to give out quickly . There is no cure or restraint method usable . Fertilizing and feeding the azalea to help maintain its overall wellness often extends the shrub ’s life . Once an azalea suffers from stunt roundworm , do not replant a new azalea in the same placement .
Phytophthora Root Rot
Phytophthora ascendent rot cause the azalea ’s leaves to turn icteric but the veins to remain dark-green . The leaves will start out to rapidly fall from the bush . Once the leaves miss off a ramification it die totally until the entire shrub perishes . Roots take on a red - browned visual aspect . The upper radical become exceedingly brickly . The discoloration before long spreads to all the ancestor and begins to make its way up the trunk of the azalea .
The disease is prolific in areas that offer inadequate drainage . Prevent azaleas from becoming afflict by planting only in a well drain location . Plant azalea in raised flower beds in area where the soil is clay , according to North Carolina State University .
