@article{wjar2021921,
author={{Mutuku, Kilonzi Jackson and Joseph, Mafurah Juma and Wabomba, Nyongesa Moses and Mwangi, Kibe Antony},
title={Efficacy of <i>Trichoderma asperellum</i> Seed Treatment and Ridomil<SUP>?</SUP> Application in Managing Late Blight on Potato},
journal={World Journal of Agricultural Research},
volume={9},
number={2},
pages={42--52},
year={2021},
url={http://pubs.sciepub.com/wjar/9/2/1},
issn={2333-0678},
abstract={Potato seed tubers latently infected with <i>Phytophthora infestans</i> initiate late blight that requires early fungicide application raising economic and human concerns. The objective of the study was to determine the efficacy of <i>Trichoderma asperellum</i> seed treatment and Ridomil<SUP>? </SUP>(Metalaxyl 4% and Mancozeb 64%) application to manage late blight. Ridomil<SUP>? </SUP>was applied at 21-, 14- and 7-day intervals on seed tuber and apical cuttings pre-treated with <i>T. asperellum</i> at 33 % (3 กม 10<SUP>6</SUP>), 66% (7 กม 10<SUP>6</SUP>) and 100% (1 กม 10<SUP>7</SUP> CFU/mL) concentration by either dipping or injection. Results revealed that 7- and 14-day spray intervals were not significantly different (<i>P</i>=0.05) in terms of yield and late blight severity. Rooted apical cuttings had 7.4% higher disease severity resulting in 2.3% lower yield than crop from seed tubers.<i> </i><i>T. asperellum</i> at 66% and 100% concentrations reduced disease severity by 26% and 27% respectively. Pericardial injection had 8.3% higher yield and conversely 7.8% higher disease severity than dipping. The combination of <i>T. asperellum</i> at 66% concentration with a 14-day spray interval provided better late blight management. The results suggest that seed treatment by dipping using 66% <i>T. asperellum</i> suspension could increase fungicide application interval by 7 days while improving on yield.},
doi={10.12691/wjar-9-2-1}
publisher={Science and Education Publishing}
}