Posts

Showing posts from January, 2021

Pseudomonas fluorescens: A bacterium that suppresses pathogenic fungal growth

Image
  Pseudomonas fluorescens   is a bacterium used as bio-control agent in agriculture to control the plant pathogenic fungi. It produces toxins which suppress the growth of certain fungal pathogens thereby reducing the disease efficacy.  It's available in wettable powder and liquid formulation DOSAGE Foliar spray: 3-5 mL/Litre of water (LF) or 5g/Litre of water (WP) Compost inoculum: 10-20g/Kg of compost Seedling dip: 5mL/Litre of water, dip seedlings for half an hour before planting Following are some of the diseases which could be controlled through Pseudomonas fluorescens ALTERNARIA LEAF SPOTS of chilli, brinjal, tomato, gourds, melons, marigold, indoor plants,beans etc Leaves will develop number of spots with brown centre, surrounded by dark brown concentric rings. Many spots will coalesce to form one big spot. Severe infestation will result in yellowing of the plant and wilting. Plants lacking in proper nutrition will be susceptible to this disease. Foliar spray of Pse...

Beauveria bassiana and Metarhizium anisophile to the rescue

Image
These two are entomopathogenic fungi which are currently used in agriculture to control insect pests ; in simple terms, these fungi kill insects. The fungal spores comes in contact with the insect body and enters through its cuticle and germinates inside, thereby invading its internal body parts and secreting toxins which then mummifies and kills the insect. The former one causes White Muscardine Disease and the later causes Green Muscardine Disease.  Grubs treated with M. anisophile, B. bassiana And Verticilium leccani When the insect dies the fungi produces spores which then disseminate on healthy insects thus the cycle continues and the pest population is reduced. Beauveria bassiana and Metarhizium anisophile are available in Wettable powder and liquid Formulations. Dosage Foliar spray : 2-3 mL/L of water (Liquid formulation). 5-8g/L of water (Wettable powder) Spray on the insects, leaves and stem. (Avoid spraying on flowers) Compost inoculum: 8-10 g/ kg of compost to kill so...

Trichoderma viride kills soil-borne pathogenic fungi

Image
This garden friendly fungus kills all the soil-borne disease causing fungi and improves the plant growth. The fungal mycelium (web like structure) is green in colour hence the name 'Green mold'. When it comes in vicinity of other disease causing fungi (white coloured), it degrades their cellulose and chitin (fungal body components) thus killing them by dominating in the root zone. This fungus is used as bio-control agent in organic agriculture disease management and is available in 'Wettable Powder and Liquid formulations'.  Dosage Seed treatment : 5g/kg of seeds Seedling dip: 2-5 g/L of water for half an hour before sowing Soil drenching: 5-8 g/L of water or 3-5 mL/L of water  Compost inoculum: 10-20 g/kg of compost Following are some of the diseases that can be controlled through Trichoderma DAMPING OFF of chilli, brinjal and tomato and other vegetable crops This disease is caused by several fungal pathogens that kills or weakens the seedlings by rotting the stem just...