Schiller, J.M. and Indhaphun, P. (1978) Economic Control of Cercospora Leaf Spot and Rust in Rainfed Peanut Production. Protection Ecology, 1 (2). pp. 109-119.
![[img]](http://eprints.icrisat.ac.in/style/images/fileicons/application_pdf.png) |
PDF
- Published Version
Restricted to ICRISAT researchers only |
Abstract
An investigation was made of the relative importance of leaf spot (C. arachidicola and C. personata) and rust (Puccinia arachidis) in limiting groundnut yields under rainfed conditions in N. Thailand, together with aspects of the control of both diseases. Rust was first observed in N. Thailand in 1972. When left uncontrolled, it reduced yields as much as Cercospora leaf spot. When both diseases were controlled yield increases of 76% were obtained. When sprays were applied for the control of 1 disease and not the other, the yield increase was only 65% of that obtained by controlling both diseases. A combination of the fungicides Benlate (benomyl 50% WP) and Manzate D [mancozeb] gave the best control of both diseases. Benlate alone controlled leaf spot but not rust, while Manzate D controlled rust and not leaf spot. Daconil [chlorothalonil] and zineb gave only partial control of both diseases. For groundnuts sown at the beginning of the wet season, commencement of spraying could be left until 6 or 7 wk after sowing. Spraying at 10-day intervals gave 8.3% higher yield than did spraying at 15-day intervals. Whereas yields continued to increase with each additional application at 10-day intervals from 60 to 90 days after sowing, the results suggested that spraying beyond 80 days might not be economic, since a yield increase of 37 kg/ha would be required to cover the cost of each application (1977 prices). It may be recommended that 4 applications of Benlate + Manzate D be made at 10-day intervals between days 50 and 80 after sowing for the effective protection to commercial crops in N. Thailand.ADDITIONAL ABSTRACT:When both leaf spot (C. arachidicola and C. personata) [Mycosphaerella arachidis and M. berkeleyi] and Puccinia arachidis were controlled, yield increase of 76% were obtained in N. Thailand. A combination of Benlate (benomyl) and Manzate D (zinc + maneb) was best against both diseases, Benlate controlling only leaf spot and Manzate D only rust. Four applications are recommended at 10-day intervals, between days 50 and 80
| Item Type: | Article |
|---|---|
| Additional Information: | SNNigam collections |
| Author Affiliation: | Thai-Australia Land Development Sta., Hang Chat, Thailand |
| Subjects: | Plant Production Plant Protection |
| Divisions: | UNSPECIFIED |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 25 Sep 2013 09:12 |
| Last Modified: | 25 Sep 2013 09:12 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/11811 |
Actions (login required)
 |
View Item |
