Details

Autor(en) / Beteiligte

• Rana, Virendra Singh
• Kaushik, Parshant
• Kumar, H.
• Devaraja, K.P.
• Gowda, Abhishek
• Shakil, Najam Akhtar

Titel

Bioefficacy evaluation of chalcone derivatives against Meloidogyne graminicola infecting rice, Oryza sativa L

Ist Teil von

• Journal of environmental science and health. Part B, Pesticides, food contaminants, and agricultural wastes, 2021, Vol.56 (9), p.801-808

Ort / Verlag

Philadelphia: Taylor & Francis

Erscheinungsjahr

2021

Quelle

Taylor & Francis

Beschreibungen/Notizen

• A series of chalcones (1-14) were synthesized, characterized (using IR and 1H NMR techniques), and evaluated with an objective to manage rice root-knot nematode (RRKN) (Meloidogyne graminicola) both under pluronic gel and field conditions. Out of these fourteen compounds, 1-(4-fluoro-phenyl)-3-phenyl-propenone (13) and 1,3-diphenyl-propenone (14) showed promising and dose dependent activity at 10, 20, and 40 mg L −1 . A significant reduction in penetration of second stage juveniles (J 2 s) in rice roots was observed in compounds 13 (9.5-12.0 J 2 s/plant) and 14 (10.5-13.4 J 2 s/plant) compared to control plants (PB1121) (13.5-23.6 J 2 s/plant) in pluronic gel study. The results of field trials indicated that 14, showed significantly (P ≤ 0.05) better plant growth on 28 days after sowing (DAS) compared to 13. Both 13 and 14 reduced gall formation significantly than carbofuran 3 G @1 kg a.i./ha. However, lower concentrations were less effective in field in reducing the gall formation. Also, a significant reduction in the number of galls was observed when soil was drenched with 14 @ 40 mg L −1 . However, root dipping was not as effective as soil drenching. The study revealed that both the chalcones have the potential for effective management of RRKN in fields, and can be a better alternative to carbofuran.