Q.Apricot trees
What would cause the leaves to turn brown right after they first sprout in spring?
You will need to further examine the tree; trunk, bark, branches and leaves.
Look for signs of canker, insects or fungus.
Environmental changes could cause the browning of leaves, such as a drop in temperature but stone fruits are susceptible to several diseases
that may involve leaves turning brown.
Here are some links with more information.
https://www.gardeningknowhow.com/edible/fruits/apricots/apricot-tree-pests.htm
https://www.gardeningknowhow.com/edible/fruits/apricots/diseases-of-apricots.htm
https://www.gardeningknowhow.com/edible/fruits/apricots/thinning-apricot-trees.htm
https://www.gardeningknowhow.com/edible/fruits/apricots/apricot-tree-growing.htm
https://www.gardeningknowhow.com/plant-problems/disease/weeping-amber-in-trees.htm
https://www.gardeningknowhow.com/edible/fruits/fegen/what-is-gummosis.htm
http://www.ipm.ucdavis.edu/PMG/C005/m005fpdiseases.html
