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Open AccessArticle

Preliminary Investigation of Effect of Neem-Derived Pesticides on Plasmopara halstedii Pathotype 704 in Sunflower under In Vitro and In Vivo Conditions

Department of Integrated Plant Protection, Plant Protection Institute, Faculty of Horticultural Sciences, Szent István University, Páter Károly utca 1, H-2100 Gödöllő, Hungary
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Plants 2020, 9(4), 535; https://doi.org/10.3390/plants9040535
Received: 22 March 2020 / Revised: 16 April 2020 / Accepted: 18 April 2020 / Published: 21 April 2020
Two neem-derived pesticides were examined under in vitro and in vivo conditions to test their efficacy in controlling Plasmopara halstedii pathotype 704, a causal agent of downy mildew in sunflower. All the tested concentrations of neem leaf extract and the highest concentration of commercial neem product significantly reduced the sporangial germination under in vitro conditions. In in vivo experiment, 3-days old pre-treated seedlings with both concentrations of neem leaf extract and the highest concentration of commercial product showed a significant reduction in the infection indicating possible systemic effect of neem. When the seedlings were treated following the infection with P. halstedii (i.e., post-treatment), only the highest concentrations of neem leaf extract and the commercial product showed a significant reduction in the infection indicating curative effect of neem. Possibilities for the control of P. halstedii with neem-derived pesticides are discussed. View Full-Text
Keywords: Plasmopara halstedii; azadirachtin; neem leaf extract; sunflower; NeemAzal T/S; biological control Plasmopara halstedii; azadirachtin; neem leaf extract; sunflower; NeemAzal T/S; biological control
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MDPI and ACS Style

Doshi, P.; Nisha, N.; Yousif, A.I.A.; Körösi, K.; Bán, R.; Turóczi, G. Preliminary Investigation of Effect of Neem-Derived Pesticides on Plasmopara halstedii Pathotype 704 in Sunflower under In Vitro and In Vivo Conditions. Plants 2020, 9, 535. https://doi.org/10.3390/plants9040535

AMA Style

Doshi P, Nisha N, Yousif AIA, Körösi K, Bán R, Turóczi G. Preliminary Investigation of Effect of Neem-Derived Pesticides on Plasmopara halstedii Pathotype 704 in Sunflower under In Vitro and In Vivo Conditions. Plants. 2020; 9(4):535. https://doi.org/10.3390/plants9040535

Chicago/Turabian Style

Doshi, Pratik; Nisha, Nisha; Yousif, Ahmed I.A.; Körösi, Katalin; Bán, Rita; Turóczi, György. 2020. "Preliminary Investigation of Effect of Neem-Derived Pesticides on Plasmopara halstedii Pathotype 704 in Sunflower under In Vitro and In Vivo Conditions" Plants 9, no. 4: 535. https://doi.org/10.3390/plants9040535

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