Q: Why isn’t my ruby red grapefruit blooming? It gets some sun in the afternoon and I have used stake fertilizers each year. I am watering it twice a week just like my lawn grass. It looks healthy, and… Read More
Category: Fruits & Vegetables
Q: The peeling of my grapefruit on my citrus tree is brown and it feels like sand paper. They are ripe and mature but what is wrong with them?
A: The disease is probably melanose, which is a common coastal fungal disease that primarily occurs in grapefruit but can attack any citrus. The first symptoms on leaves are small, circular, dark depressions with a yellow margin, similar… Read More
Q: I have a citrus tree and the leaves are curling, dropping off, and they look pale. What is wrong with my tree?
A: I am glad you brought a clipping of the tree to me. After examining it closely, I could see the culprit was a citrus mite. The citrus red mite or purple mite, Panonychus citri (McGregor), was first… Read More
A: The leaf problem is caused by a small leafmining moth, Phyllocnistis citrella Stainton, or the citrus leafminer (CLM). Citrus leafminer (CLM) was found in late May 1993 in several citrus nurseries in south Florida. Since that… Read More
A hard freeze is considered 28 degrees for 4 hours or more. To be completely safe, protect young trees (under 5 years) whenever temperatures drop below 32 degrees. Be sure you take extra precaution by covering the… Read More
A: Citrus fruit splitting could be a combination of several factors. If the tree is allowed to produce too many fruit then the quality of those fruit is often poorer than if fewer fruit were allowed to develop… Read More
Q: What could be eating the leaves on my citrus tree? The fruit are not being touched. Should I be worried?
A: There could be several creatures eating the leaves of your citrus trees. It is possible a katydid or a grasshopper are snacking on the leaves. The katydid, although very large in size, looks so much like a… Read More
Q: What is wrong with my citrus tree? I see little white flies whenever I get near the fruit or leaves. I turned some of the leaves over and saw these orange specks. Is this an insect or a disease?
A: Actually the orange spots you see are neither an insect nor a disease. The spots are beneficial fungi which attack the young stationary stage (pupae) of a common citrus pest called the white fly. The white fly… Read More
A: Pruning of citrus can be done in late February and early March. Remember to selectively prune the citrus tree – no shearing. Find a growth bud, which is where a new leaf or limb will grow and… Read More
Q: I have a Calamondin citrus tree in my yard and I have no idea what to do with the fruit since it is too sour to eat.
A: Calamondin, Citrus mitis, is an acid citrus fruit originating in China and introduced to the U.S. in the early 1900’s. It can be eaten but the fruit is quite tart. So, what can you do with the fruit? … Read More