Why is my loquat tree losing its fruit? I live in Morgan Hill, south of San Jose, CA.
Temperature changes, a drop to 25F will cause fruit to drop,
The green apple aphid (Aphis pomi) and the codling moth (Cydia pomonella) infest loquat trees in California will cause fruit drop.
Fire blight (Erwinia amylovora), spread by bees, attacks loquat trees in areas of high humidity or that have late spring and summer rain.
Fertilizing recommendations vary. Some authorities say they should be fertilized once a year in mid-winter. For each tree 8 to 10 feet tall, the California Rare Fruit Growers Association recommends applying 1 pound of 6-6-6 fertilizer three times a year when the trees are actively growing.