Preparation of new biofungicides using antagonistic bacteria and mineral compounds for controlling cotton seedling damping-off disease

• Autorzy: Ardakani S S , Heydari A. , Khorasani N.A. , Arjmandi R. , Ehteshami M.

Warianty tytułu

PL

Przygotowanie nowych biofungicydow do zwalczania zgorzeli siewek bawelny przy wykorzystaniu antagonistycznych bakterii i mineralnych skladnikow

• Języki publikacji: EN

Abstrakty

EN

The overuse of chemical pesticides in agriculture has caused serious environmental problems and thus the demand for safer pesticides is increasing. One alternative is microbial pesticides that suppress plant pathogens via their microbial activities. As microbial pesticides are eco-friendly products, in this study we prepared four biological fungicides using two isolates of Pseudomonas fluorescens that included a talc-based powder and bentonite-based powder as mineral carriers. Then we evaluated the efficacy of these products in controlling cotton seedlings, damping-off, a fungal disease caused by Rhizoctonia solani at four intervals of 15, 30, 45 and 60 days after sowing the cotton seeds under greenhouse conditions. The results of greenhouse experiment on application of biofungicides showed that the efficacy of Bentonite-B1 treatment to control R. solani was promising as it increased the number of healthy seedlings 3.42 to 3.57 - fold and was much more effective than the carboxin/thiram fungicide in all stages.

PL

Nadmierne stosowanie chemicznych pestycydów rolnictwie było przyczyną poważnych problemów środowiskowych, co spowodowało wzrost zapotrzebowania na bezpieczniejsze pestycydy. Jedną z alternatyw są pestycydy mikrobiologiczne wykazujące supresyjne działanie wobec patogenów roślin poprzez ich aktywność mikrobiologiczną. Ponieważ mikrobiologiczne pestycydy są przyjazne środowisku, w toku przeprowadzonych badań przygotowano cztery biologiczne fungicydy, wykorzystując dwa izobaty Pseudomonas fluorescens, zawierające proszek oparty na talku i bentonicie, które były nośnikami mineralnymi. Następnie oceniano skuteczność tych produktów w zwalczaniu zgorzeli siewek bawełny wywołanej przez Rhizoctonia solani zachowując 15, 30, 45 i 60-dniowe przerwy po wysiewie w warunkach szklarniowych. Uzyskane wyniki doświadczenia szklarniowego wykazały, że skuteczność zastosowania Bentonitu-B1 w celu zwalczania R. solani była obiecująca, gdyż zabieg ten powodował wzrost liczby zdrowych siewek o 3,42 do 3,57 razy i był skuteczniejszy niż użycie we wszystkich stadiach fungicydu zawierającego karboksynę i tiuram.

Słowa kluczowe

EN

environment contamination; Rhizoctonia solani; mineral compound; Pseudomonas fluorescens; antagonistic bacteria; new biofungicide; plant disease; damping off disease; biological control; seedling; plant protection; biofungicide; cotton

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2009
• Tom: 49
• Numer: 1
• Opis fizyczny: p.49-55,ref.

Twórcy

autor

Ardakani S S

• Islamic Azad University-Science and Research Branch, Tehran, Iran

autor

Heydari A.

autor

Khorasani N.A.

autor

Arjmandi R.

autor

Ehteshami M.

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