Table 4.6. Chemicals for the control of black root, rhizoctonia, and verticillium wilt.

Common Name Trade Name

Chlor-O-Picrin 96.5 Chlor-O-Pic, Picfume

Methyl bromide 98-100 Brom-O-Gas, MC-2R,

 Terr-O-Gas 98 or 100

 Methyl bromide 68 Brom-O-Sol, Brozone

 Methyl bromide + MC-33, Terr-O-Gas 67
 Chloropicrin 67:32

 Metam sodium (SMDC) Vapam

 Source: Florida Plant Disease Control Guide, 1993, pp. 426-427.



 Rhizoctonia bud rot, caused by Rhizoctonia solani, attacks the bud portion of the plant

and can lead to death of lateral buds and sometimes the entire plant. Appropriate planting depth

is an important cultural management technique because the chances for infection increase if the

plant is planted too deep. In addition, avoid planting in areas where known species exists, and

allow the cover crop to dry prior to turning it under by cultivation. Cool weather and humid

weather are conducive environmental conditions for plant infection. Chemical controls include

the use of Benomyl or Thiram which can be used to aid control of foliar diseases caused by

Rhizoctonia species. In Table 4.6, the additional chemicals that can be used for preventive

control of Rhizoctonia caused diseases are listed.