Plant Protection of Strawberry

Angular leaf spot

SYMPTOMS

Very small water-soaked lesions on lower surfaces of leaves which enlarge to form dark green or translucent angular spots which ooze bacteria; lesions may coalesce to form reddish spots with a chlorotic halo

CONTROL

Spray ACUROSIL NANO+ @1.5ml/ltr

Anthracnose

SYMPTOMS

Leaf spot

Round black or light gray lesions on leaves; numerous spots may develop but leaves do not die

Runners and petioles

Dark brown or black sunken, circular lesions on stems, petioles and runners; plants may be stunted and yellow; plants may wilt and collapse; internal tissues discolored red

Crown rot

Youngest plant leaves wilt during water stress in early afternoon and recover in the evening; wilting progresses to entire plant; plant death; reddish-brown rot or streak visible when crown is cut lengthways

Bud rot

Damp, firm dark brown to black rot on buds; plants with single buds may die; plants with multiple crown may wilt as disease progresses

Flower blight

Dark lesion extending down pedicel which girdles the stem and kills the flower; flowers dry out and die; infection after pollination may result in small, hard, deformed fruit

Fruit rot

Light brown water-soaked spots on ripening fruit which develop into firm dark brown or black round lesions

CONTROL

Spray ACUROSIL NANO+ @1.5ml/ltr

Botrytis fruit rot/ Blossom blight

SYMPTOMS

Blossoms turning brown and dying; misshapen fruit; patches of rot on fruit which enlarge and often affects entire fruit; masses of gray mycelium on surface of rotting tissue; no leakage of fluid from fruit; fruit becomes dried and mummified

CONTROL

Spray ACUROSIL NANO+ @1.5ml/ltr

Leaf spot

SYMPTOMS

Small round or irregular deep purple lesions on upper surfaces of leaves which enlarge and develop a gray-white center; lesions can grow large in susceptible varieties and the center of the lesion remains brown; lesions may also develop on fruit, petioles and stolons

CONTROL

Spray ACUROSIL NANO+ @1.5ml/ltr

Phomopsis leaf blight

SYMPTOMS

One to five circular, red-purple spots on leaflet; distinct zonal patterns on leaves with dark brown center surrounded by lighter brown and then purple, red or yellow; dark elongated and sunken lesions on petioles, stolons and fruit trusses

CONTROL

Spray ACUROSIL NANO+ @1.5ml/ltr

Powdery mildew

SYMPTOMS

Patches of fuzzy white fungal growth on lower leaf surface which enlarge and coalesce; leaf edges curling upwards; purple-red blotches on lower leaf surface; deformed fruit may be produced if flowers become infected, severe infections may cause the plant to produce no fruit

CONTROL

Spray ACUROSIL NANO+ @1.5ml/ltr

Red stele

SYMPTOMS

Stunted plant growth; old leaves withered and may have red yellow or orange tinge; new leaves small; little or no fruit produced and few runners; reddish discoloration of root core which may extend into the crown

CONTROL

Sterlise the soil with ACUROSIL NANO+ @30ml/ltr/sqm and continue using ACUROSIL NANO+ after plantation through drip and drenching for prevention.