Pepper leaf curl disease symptoms
Chili hairy leaves, plant atrophy.Height of chili blossom, virus disease, flowering significantly reduced, the fallen petal fruit is quite serious, fruit rate is low, the decline in output, even can't blossom, must pay attention to prevention and control, in order to protect the plants.
Pepper leaf curl disease etiology
1, the physiological reasons
Seedbed long-term low temperature and humidity: the growth of plants and stem leaf etiolation, parietal curled, sluggish growth, serious water retting root, the root is rusty, and decay.
Water: soil drought, water shortage cause leaf curl disease.
High temperature, strong light, high temperature, plant water loss, easy cause leaf curl, if insufficient water supply at the same time, the volume is more serious.So the summer hot pepper leaf curl occur easily.
Fruit leaf ratio: plant fruit too much, lack of leaf area, leaf blade because nutrition is widely used in the fruit growth, its malnutrition curl.
2, fertilizer damage and adr
Foliar spraying pesticide and foliar fertilizer concentration is too high, or high temperature spray around noon, foliar fertilizer, easy cause leaf curl.
Continuous wet weather, hot pepper, slow growth resistance is low, the pesticide resistance capacity will reduce.At this time, spraying, concentration is too large will also produce the adr.
3, yellow tea mite
The adult mites and mite young gathered in chili more young new foliage back, tender stem, bud, sucking in areas such as the young fruit juice, the plant.
Are beige and oil-immersed suffer blade on the back of the gloss, the back margin to curl, forming the buckle.
Flower buds and young fruit victims are not flowering deformity or open flowers, the person that weigh can't fruit type (like a streak virus disease symptoms).
Fruit victims, peduncle and sepals surface are pale to beige, lose luster, cork, suffer serious when, the fallen petal, leaves, fruit, causing massive production.
4, aphids harm
Aphids are in aphid or if the aphid clustered into host leaves back, tender and tender stem tip on sucking on SAP.Suffer blade formed on the spot, leaf curling.When weight is slow, affect the growth of pepper caused by fallen petal fruit abscission, greater influence on yield and quality.At the same time, spreading the virus.
5, virus disease harm
Virus disease is mainly composed of aphids, such as rice planthopper insect poison, poison with poison, farming operations spread or seeds.Common symptom such as Mosaic, deformity and streak.
Mosaic type: disease leaves thick green and light green and white Mosaic, shrivel.
Vane deformity or clump of clusters malformation type: at the beginning of the plant leaf veins return green heart, gradually formed depth uneven patches, foliar shrivel, after disease Ye Zeng thick, yellow, green and white mottled or large brown necrotic spots, leaf curl upwards.
Streak: blade main vein in brown or black necrotic, gradually extended to the collateral, main stem and growing point, cause falling flowers, leaves, fruit, so that the whole plants die.
