Salmonella-Shigella plates. Salmonella-Shigella (SS) plates are used to detect bacterial contamination on raw meat. Salmonella-Shigella agar plates contain lactose, bile salts, ferric citrate, and neutral red.The bile salts select for Gram-negative bacteria.almonella-Shigella plates. Salmonella-Shigella (SS) plates are used to detect bacterial contamination on raw meat. Salmonella-Shigella agar plates contain lactose, bile salts, ferric citrate, and neutral red.
The best time to prune them is in early spring, just before they put on their growth spurt. You can do minor shaping and pruning at other times of year, too. Test Garden Tip: Save on holiday decorations by snipping a few branches for winter holiday greenery.
Planting: Early spring (before the trees have leafed out) is also a good time to plant trees. If possible, avoid planting on extremely hot, dry and windy days to reduce water stress on the trees. Tree wrap: If the tree was wrapped for winter protection, remove tree wrap. This wrap interferes with photosynthesis, which can occur in the bark of young trees. Construction damage protection: Construction season is on its way.