DIFFERENT TYPES OF AGAR Mac Conkeyâs Agar plate MacConkey (also McConkey) agar is a culture medium designed to grow Gram-negative bacteria and stain them for lactose fermentation.he pattern of lactose fermentation and H 2 S production aids in the identification of the organism subbed to the plate. HE agar is designed to isolate and recover fecal bacteria belonging to the Enterobacteriaceae family. HE is particularly useful in isolating Salmonella and Shigella.
In fact, spring should be the only time for complete cutting back. Pruning hibiscus plants entirely helps rejuvenate them for summer blooming. Branch tips can be pinched, or tip pruned, throughout the season, however, to encourage bushier growth.
Luckily, we already covered one of the associated problems with last week's e-mail tip on Mealy Bugs. In fact, my next book may be all about tropicals for Houston and that would definitely include a major chunk dedicated to Hibiscus. Like most situations in gardening, there is not one clear cut answer. But there are a couple of dominant reasons, especially in Houston. The first reason for bud drop can be attributed to the really hot weather. Remember, these are tropical plants that would much prefer 88-90 degrees with lots of humidity. Temperatures above 95 for long periods of time can stress out some Hibiscus hybrids to a point that they shed their blooms as a natural defense mechanism. Moving potted Hibiscus could also cause premature bud drop.