reserach title defense

What caused rice-blast disease?

It is cause by a fungus called PYRICULARIA ORYZAE.

How does it damage rice plants?

It forms lesions or spots on leaves, stems, and grains. It stops the plant from growing properly and reduces harvest yield — sometimes by as much as 50–80% if severe.

Why is rice-blast a serious problem?

Rice is the main food in the Philippines. This disease spreads fast, destroys crops, and causes big income loss for farmers..

What do farmers usually use to control it?

Mostly chemical fungicides. But these are costly, can leave toxic residues, har the soil and water, and over time the fungus may become resistant to them.

How will your study help with rice-blast?

We test if Piper betle extract can inhibit or stop the growth of Pyricularia oryzae. If effective, it can be a natural, safe, and cheaper alternative to chemicals.

What does “inhibition of Pyricularia oryzae” mean?

It means slowing the fungus from growing, spreading, and infecting the rice-plant, so it can no longer cause rice-blast disease.

How will you know if the extract works against it?

We will measure the size of the fungal growth or lessions. If the growth is smaller or stops compared to the control, it means the extract has antifungal effect.

Why target Pyricularia oryzae specifically?

Because it is the main and most destructive cause of rice-blast, so controlling it directly solves the disease problem.

What is Pyricularia oryzae?

Also called Magnaporthe oryzae, is a pathogenic fungus— the casual agent of rice-blast disease, the most destructive disease of rice worldwide.

How does it harm rice?

By producing leions on leaves, blocks photosynthesis, spreads fast via air-borne, thrives in warm-humid conditions, causes 10-80% yield-loss.

Why is it your target?

Its resistant strains are emergingj