Author Question: The chemical most often used for pasteurization of greenhouse root substrate is _____________ It is ... (Read 45 times)

wrbasek0 · **on:** Jul 22, 2018

The chemical most often used for pasteurization of greenhouse root substrate is _____________ It is used at the rate of ______ pound per cubic yard of substrate. It should not be used below a temperature of ____ oF. The treated root substrate should be covered for ____ days. It is then aerated for _____ days before handling. Seeds can be planted in it _____ days and cuttings ____ days after aeration began.

Fill in the blank(s) with correct word

Question 2

What advantages and disadvantages does chemical pasteurization offer compared to steam?

What will be an ideal response?

Sierray · **Reply #1 on:** Jul 22, 2018

Answer to Question 1

methyl bromide, 1, 40, 1-2, 1-2, 3, and 7-10.

Answer to Question 2

It eliminates the necessity for a steam source. Disadvantages include the
long period of time required for penetration and aeration, incomplete kill of some
pathogens such as verticillium wilt of chrysanthemum, toxicity of the chemicals to
humans, toxicity of chloropicrin to any plants in the greenhouse where it is used,
and the toxicity of methyl bromide to carnations later planted in the treated
substrate.