Untitled Quiz

Brown discoloration, chaffy appearance, and white to light pink fungal growth on grains. This indicates a fungal infection.

A bacterial disease caused by Xanthomonas oryzae. Symptoms include tiny water-soaked spots on leaves that enlarge, turn yellow, and dry rapidly. Seedlings can wilt.

A bacterial disease caused by Xanthomonas oryzae. Symptoms include fine translucent streaks on leaves, which enlarge lengthwise and form large brown areas. Eventually, the entire leaf turns brown and withers.

A viral disease that causes mottled young leaves, yellowing of older leaves, and stunting of the plant. Spread by green leafhoppers.

A viral disease that causes severe stunting, profuse tillering, erect growth habit, and short, narrow, pale green leaves with dark brown spots.

A viral disease causing stunting, torn or ragged leaves with twisted tips, vein swellings, and a green plant.

An insect that damages rice plants. It is light brown with strong, curved forelegs for digging soil.

Symptoms of bacterial leaf blight appear on leaves in the form of tiny water-soaked spots. These spots enlarge and turn yellow as the disease progresses, eventually leading to the drying of the leaf and wilting of the seedling.

Stem borers, like Bacillus thuringiensis, attack rice plants by tunneling into the stems, disrupting nutrient transport and causing wilting or lodging.

Sprays and granules are equally effective for controlling stem borers in flooded rice fields during the tillering stage.

Only spray formulations are effective for controlling stem borers during the panicle initiation to flowering stages.

Brown planthoppers are small, brown insects that suck sap from rice plants, causing yellowing, drying, and 'hopperburn' patches.

Brown planthoppers are commonly found in rainfed and irrigated wetland fields, especially in direct-sown rice with high nitrogen levels.

Brown planthoppers can attack rice at any stage, but they cause the most damage from the early tillering stage to flowering.

White-backed planthoppers are small insects with a white marking on their back that suck sap from rice plants, causing drying, 'hopperburn', and mold growth.

White-backed planthoppers are found in rainfed and irrigated wetland fields, particularly in areas with excessive nitrogen, continuous submergence, and lush rice plants.

A fungal disease caused by Thanatephorus cucumeris, affecting rice plants primarily at their leaf sheaths above the water line. It manifests as oval gray spots that enlarge and darken with black brown margins and gray centers. Sclerotia may be present on affected areas.

Rice plants are most vulnerable to Sheath Blight from the tillering stage to heading.

A fungal disease caused by Cochliobolus miyabeanus, impacting rice plants, primarily leaves, seedlings, and grains. It presents as small, circular, or oval spots with gray centers, often scattered on leaves and leading to leaf withering. Seed infection can occur through infected seeds.

Rice seedlings are susceptible to Brown Spot infection when they are in the seedbed due to infected seeds and manifest as brown spots on the leaf coleoptile and black lesions on roots.

A fungal disease caused by Magnaporthe salvinii, primarily affecting rice stems and leaf sheaths near the water line. It presents as small, black, irregular lesions that enlarge, infecting the stem and causing leaf sheath rot. Black sclerotia are embedded in decaying tissues.

Rice plants are highly susceptible to Stem Rot from late tillering to maturity, as the fungal infection progresses from leaf sheaths to the stem.

A fungal disease caused by Acrocylindrium oryzae, primarily affecting the uppermost leaf sheath that encloses the emerging panicle. It presents as irregular lesions with gray centers and brown margins, resulting in partially emerged panicles and mostly unfilled seeds due to the fungal mass inside the sheath.

Rice plants are susceptible to Sheath Rot from the tillering stage to panicle initiation, particularly when the panicle is emerging from the sheath.