Exploitation of plant products and bioagents for ecofriendly management of chilli fruit rot disease

• Autorzy: Anand T , Bhaskaran R.

Warianty tytułu

PL

Wykorzystanie produktow roslinnych i czynnikow biologicznego zwalczania w przyjaznym dla srodowiska zwalczaniu antraknozy chilli

• Języki publikacji: EN

Abstrakty

EN

Forty four plant species and eight antagonistic organisms were tested against Colletotrichum capsici and Alternaria alternata, the causal agents of fruit rot disease of chilli. In vitro studies indicated that leaf extracts (10%) of Abrus precatorius (Gundumuthu) and Aegle marmelos (vilvum), demonstrated the highest inhibition of spore germination and mycelial growth of these two pathogens. Among the fungal and bacterial antagonists tested, Trichoderma viride isolate 3 and Pseudomonas fluorescens were very effective in inhibiting mycelial growth of the pathogens in vitro. In the pot culture experiment, two sprays with leaf extract of A. precatorius (10%), first spray 20 days after fruit set and the second spray 2 days after inoculation with the pathogens, resulted in the lowest disease incidence (23.95%) and intensity (27.60 PDI - Per cent Disease Index) as compared to 71.50% incidence and PDI of 78.20 in the control. Among the antagonistic microorganisms two sprays of talc-based formulation of P. fluorescens (2%) were very effective in reducing the disease intensity (35.70 PDI). However, the leaf extracts and antagonistic organisms only ranked next to the fungicide (carbendazim 0.1%) (18.05 PDI). Field evaluation of the effective plant extracts, antagonistic microorganisms and fungicide revealed that spraying with A. precatorius leaf extract (10%) twice, the first spray at the time of fruit set and the second spray 20 days after fruit set caused the maximum disease reduction (25.53 PDI) followed by a single spray of the same leaf extract (10%) on 20th day after fruit set (28.50 PDI).

PL

Badano wpływ czterdziestu czterech gatunków roślin oraz ośmiu antagonistycznych organizmów na Colletotrichum capsici i Alternaria alternata, które powodują zgniliznę owoców chilli. Badania in vitro wskazały, że ekstrakty z liści (10%) Abrus precatorius i Aegle marmelos najsilniej inhibitowały kiełkowanie zarodników i wzrost grzybni tych patogenów. Spośród testowanych, grzybowych i bakteryjnych antagonistów Trichoderma viride izolat 3 i Pseudomonas fluorescens inhibitowały bardzo efektywnie wzrost grzybni patogenów in vitro. W doświadczeniu wazonowym, dwa zabiegi opryskiwania ekstraktem z liści A. precatorius (10%) - pierwszy zabieg 20 dni po pierwszym zawiązaniu owoców i drugi zabieg dwa dni po inokulacji patogenami, spowodowały najniższe wystąpienie choroby (23,95%), o najniższym nasileniu (indeks porażenia 27,60), odpowiednio w porównaniu do kontroli (71,50% i 78,20). Spośród antagonistycznych mikroorganizmów dwa opryski formulacją P. fluorescens opartą na talku, były bardzo efektywne w ograniczeniu nasilenia choroby (indeks porażenia 35,70). Jednak ekstrakty z liści i antagonistyczne mikroorganizmy były mniej efektywne niż fungicyd (karbendazym 0,1%) (indeks porażenia 18,05). Polowa ocena efektywnych wyciągów roślinnych, antagonistycznych mikroorganizmów i fungicydu wykazała, że dwa opryski wyciągiem z liści A. precatorius (10%) - pierwszy w czasie zawiązywania owoców i drugi 20 dni po zawiązaniu owoców, spowodowały maksymalne ograniczenie choroby (indeks porażenia 25,53), a na następnym miejscu był jeden oprysk tym samym ekstraktem z liści (10%), wykonanym dwudziestego dnia po zawiązaniu owoców (indeks porażenia 28,50).

Słowa kluczowe

EN

fruit rot disease; biological agent; Capsicum annuum; bioagent zob.biological agent; chilli; plant product; ecofriendly management; Pseudomonas fluorescens; plant disease; Alternaria alternata; biological control; plant protection; exploitation; Colletotrichum capsici

• Wydawca: -
• Czasopismo: Journal of Plant Protection Research
• Rocznik: 2009
• Tom: 49
• Numer: 2
• Opis fizyczny: p.195-203,fig.,ref.

Twórcy

autor

Anand T

• Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India

autor

Bhaskaran R.

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