TGDF

Fruit Leaf Scorch Disease

Symptoms:

The leaf edges turn brown and dry out.

Commonly affected fruits:

Watermelon, strawberry, pear, apple

Prevention and Treatment:

Apply organic fertilizer and deeply till the soil; apply trace nutrients such as magnesium and iron."

Yellow Stripe Leaf Spot Disease

Symptoms:

     1. Mostly appears on upper leaves
     2. Small yellow-green stripes appear initially
     3. The center of the disease spots dries up and turns into a light gray color. There are black or dark      brown lines on the outer edges, with a yellow halo around them.

Commonly affected fruits:

Banana

Medications:

Decoquinate, Fenbendazole

Anthrax

Symptoms:

     1. circular, elliptical, and reddish-brown spots on leaves
     2. sometimes with yellow halo, eventually turning blackish-brown with small black dots arranged in      concentric circles
     3. later stage of the disease leads to perforation of the spots and drying of the leaf

Commonly infected fruits:

grapes, citrus, mango

Medications:

bromoxynil, metiram

Powdery Mildew

Symptoms:

1. yellow spots develop on leaves and then turn into circular spots
2. white powdery layer on the surface

Commonly infected fruits:

strawberries, apples, melons

Medications:

metiram, pyraclostrobin, epoxiconazole

Black Rot

Symptoms:

Develops near circular, light green spots that eventually turn black; a black, moldy fungal growth appears on the surface; infected areas appear sunken, hardened, and deformed with star-shaped cracks.

Commonly infected fruits:

apples, pears

Medications:

pyraclostrobin, cyflufenamid, bacillus subtilis, dithianon zinc

Gray Mold

Symptoms:

      1. The disease gradually spreads from the bottom to the top.
      2. Polygonal chlorotic spots appear on the front.
      3. A purple-grey mold layer appears on the back when it is moist.

Commonly infected fruits:

Lychee, Grape.

Recommended treatments:

Copper hydroxide, Copper resin acid, Difenoconazole, Flumorph.

Rot disease

Symptoms:

The fruit is dark red in color and has a circular or irregular shape with rings, and a clear edge.

Commonly infected fruits:

Apples, pears

Recommended treatments:

Bai-bacteria clear, Daisen ammonium.

Bacterial canker disease

Symptoms:

Purple-brown spots appear on the petioles and fruit stalks in the initial stages of the disease, and the spots extend longitudinally to turn the petioles and fruit stalks black-brown.

Commonly infected fruits:

Apples

Medications:

Difenoconazole, Flusilazole, Propiconazole, Pyrimethanil.

Wilt disease

Symptoms:

Plant wilting

Commonly infected fruits:

Watermelon

Medications:

Dazomet, Carbendazim, Pyrimethanil

Citrus scab disease

Symptoms:

premature fruit and young leaves falling off, underdeveloped and deformed fruits

Commonly infected fruits:

citrus fruits

Medications:

Bordeaux mixture, copper oxychloride, carbendazim, thiophanate-methyl

Root knot nematode disease

Symptoms:

      1. Root knots on the roots
      2. Wilting of leaves at noon
      3. Short stature

Commonly affected fruits:

waxberry, banana

Medications:

Abamectin, Thiophanate-methyl.

Sigatoka disease

Symptoms:

Small oval brown spots on the leaves that eventually expand into long oval-shaped spots with slightly raised ends. The center of the spot is gray to gray-brown with a brownish outer ring. There are indistinct concentric rings near the edge of the spot, and a yellow halo is visible around the perimeter of the spot. Gray-brown mold can be found on the back of the spot.

Commonly affected fruits:

Bananas

Medications:

Bordeaux mixture, Azoxystrobin, Cyproconazole, Flutriafol.

The Genomic Database Of Fruit

Common fruits diseases