Addressing physiological leaf curl in tomatoes – St. John News
Tomato Diseases - YouTube
Tomato Leaf Curling | Purdue University Vegetable Crops Hotline
Some leaf-curl problems can be corrected | The Spokesman-Review
Physiological leaf roll begins with an upward curing of older leaflets. Leaf roll may progress until the margins of the rolled leaflets touch or even overlap. Rolled leaves are firm and leathery
Physiological Leaf Roll of Tomato | OSU Extension Catalog | Oregon State University
Why tomato leaf curl happens and what to do - Nordic Lavender