Identify and prevent the symptoms of Blast disease in paddy

Identify and prevent the symptoms of Blast disease in paddy
  • All aboveground parts of the rice plant (leaves, leaf collar, culm, culm nodes, neck, and panicle) are attacked by the fungus.

  • Initial symptoms are white to grey-green lesions or spots with brown borders

  • Small specks originate on leaves – subsequently enlarged into spindle-shaped spots with an ashy centre.  

  • Older lesions are elliptical or spindle-shaped and whitish to grey with necrotic borders, several spots coalesce to form big irregular patches.

  • The nodal infection causes the culm to break at the infected node

  • Internodal infection also occurs at the base of the plant which causes white panicles similar to that induced by yellow stem borer or water deficit

  • Lesions on the neck are greyish brown and cause the girdling of the neck and the panicle to fall over

  • If infection of the neck occurs before the milk stage, no grain is formed, but if infection occurs later, grains of poor quality are formed

  • Lesions on the branches of the panicles and on the spikelet pedicels are brown to dark brown.

  • For its management, spray Tebuconazole 50% + Trifloxystrobin 25% WG 150 gm/acre or Tricyclozol 70% WP 120 gm/acre or Isoprothiolane 40% EC 300 ml/acre.

  • Spray Pseudomonas fluorescens 250g/acre for organic management.

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The mosaic virus can cause heavy damage to the soybean crop

Mosaic virus can cause heavy damage to soybean crop

  • The mosaic virus can cause losses of up to 8-35% in soybean crops.

  • The carriers that spread this virus are sap-sucking insect whiteflies. 

  • Symptoms of mosaic virus vary according to the variety of soybean crops, due to its infestation, the leaves turn yellow and yellow-green spots are formed on the leaves. Due to the incomplete development of the leaves, the leaves become distorted and appear to be turned downwards.

  • Also, the plant does not develop properly and the pods are not formed properly. Due to which it affects production.

  • For its control, first of all, it is necessary to control the sucking insect, to control it, the following spraying can be done in a timely manner –

  • 1st spray:- Thiamethoxam 25% WG [ Areva ] @ 100 gm/acre, second spray :- Acetamapride 20% SP [ Dhanpreet] @ 100 g/acre + Kasugamycin 3% SL  [ kasu B ] @ 300 ml/acre or Streptomycin Sulphate IP 90% w/w + Tetracycline Hydrochloride IP 3% w/w [Streptocycline] @ 20 gm/acre, third spray:- Bifenthrin 10% EC [Markar] @ 300 ml per acre + Validamycin [Sheathmar] @ 300 ml per acre. Keep in mind that there should be a gap of 5-7 days between all the three sprays. or 

  • For whitefly control, spray Acetamiprid 20% SP [ Dhanpreet] @ 100 gm/acre or Bifenthrin 10% EC [Markar] @ 300 ml/acre or Diafenthiuron  50%WP [Pager] @ 250 gm/acre.

  • For biological control, spray Metarhizium  [ KALICHAKRA ] @ 1 kg/acre or Bavaria bassiana  [Bave Curb ] @ 250 g/acre.

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Management of fruit fly in gourd crops

Management of fruit fly in gourd crops
  • The maggot burrows into the fruits and remains inside and feeds. Infected fruits decay and drop.

  • They fly mainly prefers tender fruits for egg-laying. Ovipositional punctures are caused by adults. From these holes, fruit juice is seen coming out. Eventually, the affected fruits rot.

  • Grown fruits infested with Fruit fly should be collected and destroyed

  • To control these flies, corn plants should be grown between the queues in the gourd field, due to the height of these plants, the fly lays eggs under the leaves.

  • During summer, deep ploughing should destroy the dormant stage (pupa) of the fly present inside the soil.

  • For effective control of pests, use light traps, Pheromone traps.

  • Spray Thiamethoxam 12.6 % + Lamda Cyhalothrin 9.5%zc 80 ml/acre or PROFENOFOS 40 % + CYPERMETHRIN 4% EC @ 400 ml/acre or Fipronil 40 % + Imidacloprid 40 % Wg 40 gm / acre.  

  • As a biological treatment.use  Bavaria Basiana @ 250 gm / acre.

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Importance of Azotobacter biofertilizer for crops

Importance of Azotobacter biofertilizer for crops
  • Azotobacter is a bacteria that is used as an organic fertilizer for nitrogen fixation in crops.

  • This biofertilizer can be used in all types of crops except pulses.

  • Its use increases the production of crops by 10 to 20%, as well as the natural taste of fruits and grains is also maintained.

  • This bacterium makes atmospheric nitrogen continuously available to the soil.

  • By using this organic fertilizer, 20 to 30 kg of nitrogen can be saved.

  • By using it, the germination of seeds is quick and the development of roots is faster.

  • Its use also increases the immunity of the crops.

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How to control the attack of thrips in chilli crop

How to control the attack of thrips in chilli crop

  • It is a small and soft-bodied light yellow insect, both the baby insect and adult insect damage the chilli crop. It is found in greater quantity on the upper surface of the leaves and also on the lower surface of the leaves. They suck the sap of leaves and flowers of chilli crop with their sharp mouthparts. Thrips infestation causes leaves to turn brown at the edges, and the leaves of the affected plant appear dry and discoloured, the leaves are deformed and curled upwards.

  • Chemical Management:- Spray Fipronil 5% SC @ 400 ml/acre or Lambda Cyhalothrin 4.9% CS @ 250 ml/acre or Spinosad 45% SC @ 75 ml/acre to control thrips attack .

  • Biological Management: – To control this pest, spray Beauveria Bassiana @ 500 gm/acre.

  • Spraying of Seaweed extract + Amino acid + Fulvic acid (Vigarmax Gel) @ 400 gm/acre must be done for better growth of chilli crop and improvement in damage caused by thrips.

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How to manage Rust disease in soybean crop

How to manage Rust disease in soybean crop
  • In the soybean crop, rust disease is known as gerua disease. The probability of an outbreak of this disease increases with frequent rainfall and low temperature (22 to 27 °C) and high humidity (relative humidity 80-90%). The intensity of the disease increases when there is fog during the night or early morning. As the temperature drops, so does the outbreak of this disease.

  • Due to the accumulation of yellow powder on the leaves, the process of making food of the leaves is greatly affected, due to which later the leaves start drying and the production is greatly affected.

  • To control this disease, spray Hexaconazole 5% SC @ 400 ml/acre or Propiconazole 25% EC @ 200 ml/acre or Tebuconazole 25.9% EC @ 200 ml/acre.

  • As a biological treatment, spray Trichoderma viride @ 500 g/acre or Pseudomonas fluorescens @ 250 g/acre.

  • Disease resistant varieties Indira Soya-9, DSB 23-2 DSB Sow 21 and Phule Kalyani etc. Uproot the diseased plant and keep it in polythene, bury it in a pit outside the field or destroy it.

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Importance of gibberellic acid to crops

Importance of gibberellic acid to crops
  • Gibberellic acid is an organic growth compound

  • It is used for the growth of crops.

  • It is a type of organic fertilizer that helps in the development of leaves and long stems of crops.

  • It increases photosynthesis, causing faster germination of seeds

  • It is a powerful hormone that helps in increasing crop production by increasing root growth.

  • This acid plays an important role in the production of good flowers and fruits.

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Crop management in Maize at the time of flowering and cob formation

Crop management in Maize at the time of flowering and cob formation
  • In the maize crop, it is very necessary to manage the crop at the stage of flowering and cob formation. This stage is very sensitive, in this stage the use of the following products is very necessary.

  • Chlorothalonil 75% WP @ 400 gm/acre or Thiophanate Methyl 70% WP @ 300 gm/acre or Hexaconazole 5% SC @ 300 ml/acre or Mancozeb 75% WP @ 500 gm/acre for control of fungal disease in the crop. 

  • For pest control sprays of Chlorantraniliprole 18.5% SC @ 60 ml/acre or Emamectin Benzoate @ 5% SG @ 100 gm/acre or Flubendamide 20% WG @ 100 gm/acre.

  • For biological treatment, spray Bave curb @ 250 gm/acre.

  • For nutrition management, spray at the rate of 00:00:50 @ 1 kg/acre + Pro aminomaxx @ 250 gm/acre.

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Symptoms and Measures of Anthracnose disease in soybean

Symptoms and Measures of Anthracnose disease in soybean
  • Anthracnose is an important disease of the soybean crop, causing yield loss of up to 16-100%. This disease affects all stages of crop development. Symptoms can be seen on leaves, fruits, pods and even stems. Irregularly shaped spots, dark sunken lesions or reddish-brown spots appear on the plant. In the early stages of the infection, there are no seeds formed in the pods. The favourable temperature is 28-32 ºC. The pathogen infects the host at a minimum temperature of 22-25ºC. 

  • To prevent this, spray Tebuconazole 10% + Sulfur 65%WG @ 500 gm/acre and Carbendazim 12% + Mancozeb 63% WP @ 300 gm/acre and Thiophanate Methyl 70% WP @ 300 gm/acre.

  • For biological treatment, spray of Trichoderma viride @ 500 gm/acre or Pseudomonas fluorescens @ 250 gm/acre can be done.

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How to control downy mildew disease in cucurbits

How to control downy mildew disease in cucurbits
  • Downy mildew is a serious and common fungal disease during warm and humid conditions with overcast days. The undersides of leaves are speckled with small, water-soaked spots that become powdery patches of mycelium and spores.

  • The infections are usually concentrated near the leaf veins. The white patches are from 1–6 cm in diameter, with corresponding yellowish-green spots on the upper leaf surface. As the disease progresses, severely infected leaves become necrotic and appear scorched. They curl and fall from plants prematurely. Mildew on immature fruit begins as circular patches of white mycelium and spores that can coalesce and cover the entire fruit. As the fruit ripens, the fungus may disappear, leaving behind grey scars. The scars restrict the growth of the underlying tissue, resulting in deformed fruit. The deformed fruit is edible but has little or no value in the market. 

  • Chemical control of downy mildew disease on crops- 

  • Chlorothalonil 75 %  WP 400 gm or Metalaxyl 8%+Mancozeb 64% 500 gm per acre spray can control the downy mildew disease.

  • For biological control Trichoderma viride 0.5 kg per acre can be used.

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