I grew a Custard apple tree from seed. It flowers but the tiny, tiny fruit dries up and drops off. Can you please tell me why?
Poor pollination, especially if humidity is low. If the flower is not pollinated, it dies and does not make fruit or the tiny fruit does not develop and thus falls off. You can try hand pollinating to see if this helps. Collect opened flowers and store in a paper bag overnight. They will shed their pollen which can then be brushed onto newly opened flowers using a small artist's brush.
I have a custard apple tree in my home in Chennai... It's almost 6 feet long.. It produces fruits but fruits are low sized and very few fruits are produced... Pls tell me a remedy to get more fruits and bigger sized fruits...
This article tells you how to care for your custard apple tree:
https://www.gardeningknowhow.com/ornamental/trees/annona/cherimoya-tree-info-and-care.htm
The hot and dry climate is perfect for custard apple farming. After 3-4 years, you can get the fruit to eat. It blossoms from April to May and fruitful during August and November. You can use custard apple in Salad, Ice-creams, Milk-shakes, Yoghurts Drinks.
Here is some more information about the tree: https://www.gardeningknowhow.com/ornamental/trees/annona/cherimoya-tree-info-and-care.htm
Only the fruits are infested. The plant is also attracting ants
We have a couple articles that will help answer your question:
https://www.gardeningknowhow.com/edible/fruits/fegen/dormant-oil-information.htm
https://www.gardeningknowhow.com/edible/fruits/apples/pests-affecting-apples.htm
Thank you very much!
The tree is self pollinating, but in its natural habitat it is pollinated by a specific beetle, so you may need to hand pollinate the tree. The article below tells how. It also says the roots are stunted and weak. Another source said the canopy can spread 20 feet. However, you can prune it to keep it in bounds.
https://www.gardeningknowhow.com/ornamental/trees/annona/cherimoya-tree-info-and-care.htm
Custard apples arent growing and are turning black
It is good that you have found out a cause! Now you can begin treatment. General insecticides will be fine, but if you know the exact insect in question, then you can treat specifically for it.
This one might be a little difficult to pin down. I'd go ahead and test the soil for nutrient deficiencies and pH imbalances. If these show normal results, then you might treat for fungal or bacterial infections. I do see a couple of spots on a few leaves, but this may not be widespread.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-soil.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm
https://www.gardeningknowhow.com/ornamental/trees/annona/cherimoya-tree-info-and-care.htm
@BushDoctor I have identified bugs inside of these fruits