bacterial leaf spot — Bacterial Leaf Spot on Lettuce: ID and Safety

Bacterial leaf spot on hydroponic lettuce is caused mainly by Xanthomonas campestris pv. vitians . It starts as small, water-soaked, angular spots on older leaves that turn black or dark brown, sometimes with yellow halos, and it spreads by splashing water, contaminated seed, hands, and tools. There’s no cure for infected leaves, so control depends on clean seed, dry foliage, good airflow, lower humidity, sanitation, and removing infected plants. Copper sprays offer limited control and aren’t a substitute for prevention.

plant tissue culture at home — Plant Tissue Culture at Home: A Beginner's Guide

Can you do plant tissue culture at home? Yes. Plant tissue culture at home uses a sugar-and-nutrient gel, clean glass jars, a pressure cooker and careful sterile technique to grow new plants from tiny pieces of leaf or stem. University of Illinois Extension recommends African violet as an easy first plant and gives a kitchen-ingredient medium recipe.