What is the difference between Pencycuron and Flutolanil

Flutolanil is a systemic fungicide for use specifically against basidiomycetes. It can be applied to foliage, to soil or paddy water and as a seed treatment. Following application, it is translocated acropetally. The fungicide inhibits hyphal growth and infection cushion formation. When used on seed potatoes, it has season-long activity. Flutolanil is safe to target crops at up to 10-times the recommended use rate. The product has the lowest chemical loading of all current seed treatments and is extremely safe for both crops and operator.

Flutolanil is active against all strains of Rhizoctonia solani whereas the current standard treatment, Monceren (pencyuron) is strong on the major AG3 strain but is weak against AG3 and AG4. Repeated use of pencycuron may select for an increased prevalence of strains other than AG3.
RhiNo is reported (Farmers Weekly, 2003) to provide some protection against silver scurf (Helminthosporium solani) on potatoes.
Flutolanil was one of seven fungicides tested (Crop Prot., 2003) for the control of daylily rust (Puccinia hemerocallidis), an emerging problem in the US ornamentals market.
A long term study was conducted in the US (Agronomy J., 2003) to assess effects of cultivation methods on disease control in the southeastern peanut / cotton rotation practice. Flutolanil was shown to provide good control of soil-borne disease and increased yield in peanuts, regardless of the type of cultivation (conventional-, reduced- and minimum-tillage).
Plant back intervals have been established and approved by the EPA. These are generally 12 months for other crops grown in the rotation (excluding peanuts and rice), but only 240 days for corn, soya or cotton; and 150 days for leafy vegetables and small grain cereals (IR4 workshop, 2003).
Prostar is labelled in the US for the control of various turf diseases including brown patch (Rhizoctonia solani), yellow patch (R cerealis), southern blight (Sclerotium rolfsii), red thread (Laetisaria fuciformis) and fairy ring.
Trials on soybeans in the Parana river basin area of southern Paraguay showed some control of Asian soybean rust (Phakopsora pachyrhizi) by flutolanil and many other fungicides (USDA, 2003). However, disease incidence was low.

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