Using Prothioconazole plus Tebuconazole for Foliar and Soilborne Disease Control in Texas Peanut

Abstract

Field studies were conducted from 2005 through 2008 in different peanut growing areas of Texas to determine both foliar and soilborne disease control and peanut response to prothioconazole plus tebuconazole (Provost) fungicide treatments when compared with other fungicides commonly used in peanut. Early leaf spot (Cercospora arachidicola S. Hori) control with prothioconazole plus tebuconazole was comparable with azoxystrobin (Abound), chlorothalonil (Bravo), or tebuconazole (Folicur) and early leaf spot incidence was reduced at least 36% relative to the untreated check with any fungicide. Southern stem rot (Sclerotium rolfsii Sacc.) control with prothioconazole plus tebuconazole was comparable to azoxystrobin or pyraclostrobin (Headline) and all fungicides reduced disease incidence at least 60% when compared with the untreated check. Peanut yields with prothioconazole plus tebuconazole were increased at least 85% over the untreated check when early leaf spot was present and at least 34% over those of the untreated check when southern stem rot was present.

Integrated Management of Major Foliar and Soil-Borne Diseases of Peanut (Arachis hypogaea L.) with Fungicides, Trichoderma and Castor Cake

“…The yield was also higher in the tebuconazole treatment compared with chlorothalonil. Grichar et al, (2010) conducted a field experiment to determine both foliar and soil-borne disease control and peanut response to prothioconazole + tebuconazole (Provost) fungicide treatments when compared with other fungicides commonly used in peanut in different peanut growing areas of Texas. ELS control with prothioconazole + tebuconazole was comparable with azoxystrobin (Abound), chlorothalonil (Bravo), or tebuconazole (Folicur) and incidence of the disease was reduced at least 36% relative to the untreated check.…”

Fungicides and Application Timing for Control of Early Leafspot, Southern Blight, andSclerotiniaBlight of Peanut

“…In the southwestern United States, the management of soilborne and foliar diseases found in peanut (Arachis hypogaea L.) requires the use of a wide range of fungicides [1][2][3][4][5]. In all the peanut production areas of the USA, chlorothalonil has been the most widely used fungicide for control of early leaf spot, caused by Cercospora arachidicola S. Hori; late leaf spot, caused by Cercosporidium personatum (Berk.…”

“…for over 30 years [6][7][8]. Despite its widespread use across the peanut belt, chlorothalonil continues to provide effective control of foliar diseases [3,8]. Also, chlorothalonil is a protectant with no "reach back" or curative activity [2,3,5,8].…”

“…Despite its widespread use across the peanut belt, chlorothalonil continues to provide effective control of foliar diseases [3,8]. Also, chlorothalonil is a protectant with no "reach back" or curative activity [2,3,5,8]. However, chlorothalonil has no activity against any diseases caused by soilborne pathogens such as southern blight, caused by Sclerotium rolfsii Sacc.…”

“…Currently, the sterol biosynthesis inhibitors (SBI) tebuconazole and prothioconazole, which are in the triazolinthione class of fungicides [11], have shown activity against C. arachidicola and C. personatum, as well as S. rolfsii and R. solani [3,12]. Prothioconazole has been used for the control of cereal diseases in Europe when applied alone or in combination with other fungicides [11].…”