Onion is one of our daily necessities. Onion doubles the taste of any food. In addition, the phytochemicals present in onions along with their nutritional properties are very beneficial for the human body. Onions contain many substances that help prevent cancer. Eating raw onions increases immunity. Onion contains many components that increase immunity. Vitamin C and calcium present in onions are beneficial for oral health.
Find the below diseases & solutions:
Onion leaf blotch disease:
In the attack of this disease, long spots can be seen along the vein of the leaf. A dark brown coating of the fungus can be seen on the affected leaves. Integrated suppression management: Keep the wound clean. Cultivate crops other than onion/garlic several times in the land and then cultivate garlic/onion again Do not plant onions too thickly. Do not cultivate onion/garlic repeatedly in the same land. Cut off the affected leaves and seeds and destroy them. Applying healthy fertilizer, providing irrigation and maintenance. Fungicides of the Propiconazol group, such as: Tilt 10 l. 5 ml in water Mix and spray twice every 12 days. If the weather is warm and humid, in addition to Rutni spray, frequent spraying should be done. Roveral, Dithen M45, Ridmill Gold MZ, etc., can be used alternately to obtain good results.
Black stock rot disease of onion:
In the attack of this disease, yellow to brown spots can be seen on the seed stem. A thick cover of fungus can be seen on the affected seed stem. At some point, the seed stem breaks. This disease is caused by the attack of a kind of fungus. Integrated suppression management: Keep the wound clean. Cultivate crops other than onion/garlic several times in the land and cultivate garlic/onion again. Do not plant onions too thickly. Do not cultivate onion/garlic repeatedly on the same land. Cut off the affected leaves and seeds and destroy them. Application and maintenance of balanced fertilizer. Fungicides of the Propiconazol group, such as: Tilt 10 l. 5 ml in water Mix and spray twice every 12 days. Taking effective measures for thrips control.
Onion white rot disease:
In the attack of this disease, the old leaves turn yellow and fall down. It rots in the outer covering of roots and tubers. This disease is caused by the attack of a kind of fungus. Integrated suppression management: Collect and destroy affected trees in the first stage. Do not cultivate onions too thickly. Do not cultivate onion/garlic repeatedly in the same land. Keep the wound clean. Cultivate crops other than onion/garlic several times in the land and cultivate garlic/onion again. Application and maintenance of balanced fertilizer. However, it is difficult to suppress this disease with fungicides If you use Roveral, Dithen M45, Ridmil Gold MZ, etc. in sequence (mixed with water at the rate of 2 g/l), some results can be obtained.
Onion tuber bursting problem:
If there is a long drought or due to dry and hot air, the onion tuber may burst due to physiological reasons or if the soil is too hard or due to sudden irrigation or application of excess nitrogen fertilizer or hormones. Integrated suppression management: Do not cultivate onions too thickly. If you suspect a problem in this pattern, do not apply excess nitrogen fertilizer or hormones to the wound. Before planting, loosen the soil by plowing well. In the dry season, regular irrigation and application of sufficient organic fertilizers.
Onion bulb rot disease:
This disease is caused by the attack of a kind of fungus. In the attack of this disease, water-soaked brown, brown or light purple spots appear on the leaves and seeds. The affected leaves die from the top. At one point the tree breaks. Integrated suppression management: Cut off the affected leaves and seeds and destroy them. Application and maintenance of balanced fertilizer. Do not plant garlic too densely. Do not plant garlic repeatedly on the same land. Keep the field clean. Cultivate a crop other than onion several times in the field and then cultivate garlic/onion again. Fungicides of the Propiconazol group, such as: Tilt 10 l. 5 ml in water Mix and spray twice every 12 days. If the weather is warm and humid, in addition to the routine spray, frequent spraying is necessary. If you alternately use rovral, Dithen M45, Ridomil Gold MZ, etc., good results can be obtained.
Onion root rot disease:
The root of the datashak fodder rots due to the attack of the fungus. Chara falls down. Integrated suppression management: To produce seedlings in the bed. Provide drainage. Use 7-10 kg of trico-compost per percent.
Onion root rot Cause of the disease:
This disease is caused by worms called Meloidogyne incognita and Meloidogyne javanica. Symptoms: The presence of a knot in the roots of the crop is a sign of this disease. The size and measurement of the knot will be small or big or what shape it will be depending on the species of knot worm, the number of worms, the crop, the age of the crop, etc. In the case of onions, the gills appear very small and in some cases so small that they cannot be seen with the naked eye. In the case of the attack of the worm, the normal work of the roots, i.e. collecting and transporting water and nutrients from the soil, is completely stopped. The tree falls very easily. The leaves lose their green color and turn yellow. When the seedling is heavily attacked by the caterpillar, many seedlings die, and even if all these seedlings survive after planting in the main field, their yield is very low. When the time of harvesting of the affected crop is advanced, the fungus and bacteria attack the gall and the good roots along with the gall begin to rot. Integrated suppression management: 21 days before planting of seedlings, 5 tons of chicken droppings/ha or 600 kg of mustard greens/ha or 7-8 days before planting of seedlings, mix tricho-compost well in the soil. Anthelmintic carbefuran group Furadni 5 g 5-6 kg per hectare should be mixed with the soil.
Onion tuber rot disease Cause of the disease:
Fusarium oxysporum f.sp. cepae and Sclerotium ceprivorum are the cause of this disease. Symptoms: Germs delay seedling growth and rot the tuber. Due to this disease, the seedling becomes bent, droops, turns yellow and dries up from the axils of the leaves. In very hot and dry weather, the tuber becomes pale. If you cut the affected part of the tuber, water-soaked brown spots can be seen. Severely affected trees come up easily when pulled. Integrated suppression management: To control this disease, treat the tuber with Amister Top 325 SC (0.1%) or Cabriotop (0.3%) or Provex 200 WP (0.25%) and 5 times at the base of the plant after 7 days from the seedling stage. to spray
Stem Rot of Onion (Sclerotium rolfsii) is a fungal disease:
The leaves of the affected tree turn yellow and fall off. The affected tree comes out of the ground very easily with the tuber. It rots in the affected area. Integrated suppression management: Do not cultivate onions every year in the affected land. Remove the affected onion plant and destroy it. Maintain proper soil moisture. Seed treatment (2.5 grams of Vitabex 200 or 2 grams of Bavishtin per cage of seeds). Seedling treatment (2.5 Vitavex or 2 grams of Bavistin per liter of water) Mix 2.5 Vitavex 200 or 2 grams of Bavistin or 4 grams of Kupravit per liter of water and spray at the base of the fodder.
Purple Blotch & Stemphylium Blight of Onion – Purple Blotch & Stemphylium Blight of Onion Cause of the disease:
This disease is caused by fungi called Alternaria porri and Stemphylium botryosum. Symptoms: 20-300 cm. This disease spreads quickly at temperature and 80-90% relative humidity. From the seedling stage of the tree to the old tree this disease can occur. First, small water-soaked brown or yellow spots appear on the leaves and seed pods. The spots gradually grow and become large spots. The middle part of the spot is reddish brown and then black. The affected leaves gradually die from the upper side. Extensively affected leaves turn yellow and die within 3-4 weeks. The seed carrier is broken. Infected seeds spread through wind and abandoned plant parts. If there is excessive dew, wet weather and rain, this disease increases rapidly. Spores of the fungus spread from one tree to another through the wind. Integrated suppression management: Burn the abandoned part of the affected tree. Apply Robral or Provex or Vitavex 200 fungicides at the rate of 2.5 grams per kg of seeds. If the disease occurs, spray 2 grams of rovral per liter of water alone or by mixing 2 grams of rovral and 2 grams of Ridomel Gold together. To control this disease, Cabriotop (3 g/liter water) or Roveral (2.5 g/liter) + Ridomil Gold (2.5 g/liter) or Eminent Pro (2.0 ml/liter water) when the disease appears in the field Apply three times after 7-10 days respectively.