Agriculture Reference
In-Depth Information
Oxycarboxin has good activity against rust fungi and is particularly useful
for their control in ornamental plants. It is also used against some soil-borne
seedling diseases in cotton growing.
Fenfuram and methfuroxam are important components in the control of
smut in wheat, barley, and oats as well as stripe disease in barley and snow
mold.
Pyracarbolid acts against rust fungi and is important in the control of cof-
fee rust.
Mode of Action
The fungicidal properties of carboxin and related carboxanilides is due to
their inhibition of glucose and acetate oxidative metabolism and RNA and
DNA synthesis, although the later may be caused by lack of cellular energy
due to the inhibition of respiration.
Toxicity
The toxicity of these products is dependent on the formulation and the in-
ert ingredients. Several formulations have severe to moderate inhalation and
eye hazards. However, most products have only slight oral and dermal haz-
ards. Fenfuram is classified as an irritant,
Formulations
Carboxin available as flowable concentrate, true solutions and wettable
powder, and oxycarboxin is available as emulsifiable concentrate and wettable
powder.
Table 5.34
Commercial products oxathiins and related carboxanilide com-
pounds.
Active Ingredient
Trade Names
Carboxin
Enhance, Pro-Gro, Vitavax 30C
Oxycarboxin
Plantvax, Carbexsin
Fenfuram
Pano-ram
Pyracarbolid
Sicarol (discontinued)
b
Benzimidazole Compounds
Since 1968, this group of compounds has been widely accepted and used as
a systemic, curative, and protective action. Benomyl, with its broad spectrum
of activity against many injurious fungi, also has exhibited ovicidal and miti-
