Apple

Climate and soil

The apple is a crop grown in temperate regions. The apple-growing regions of India, however, do not fall inside the temperate zone; rather, the Himalayan mountain ranges and the area's high elevation are to blame for the region's predominant temperate temperature. During the active growing stage, the summertime temperature should be between 21 – 24 degree C on average. Apple thrives in areas where trees have continuous wintertime rest and plenty of sunlight for optimal colour development. It may be cultivated between 1500 and 2700 metres above sea level. The best conditions for apple tree development and fruitfulness are well-distributed rainfall of 1000–1250 mm throughout the growing season. The optimal soil for growing apples is well-drained loam soil that is 45 cm deep and has a pH range of 5.5 - 6.5. There shouldn't be any hard foundations or standing water in the soil.

Land Preparation
Pits are excavated two weeks before to planting. The pits are filled with organic materials and fine loamy soil. Scooping up some dirt, you place the soil ball in the centre of the pit while preserving the roots. The remaining space is filled with loose dirt and softly pushed to seal air spaces. The seedlings are immediately staked and watered.
Seed rate and spacing
The average number of plants may vary from 200-1250 per hectare depending on planting density. Apple is normally planted at a spacing of 4 x 4 m in pits of 60 cm x 60 cm x 60 cm.
Crop nutrition management
Crop nutrition management
Irrigation Management
Apple cultivation requires 115 cm of irrigation each year, which should be spread out across 14 to 20 irrigation. Watering should be given every six to ten days in the summer and every three to four weeks in the winter. During the crucial months of April to August following fruit set, at least 8 irrigations are necessary.
Weed management
Glyphosate at an application rate of 800 ml per hectare or Gammaxone/Paraquat at a concentration of 0.5 percent can eliminate weed growth for four to five months.
Harvesting and post-harvest management

The apple fruit has to be harvested when it is ready for plucking. Because apples are climacteric fruits, ripening does not occur at the same time as fruit maturity. The fruit should be stored in a cold, well-ventilated area after picking in order to eliminate field heat before packing. A effective approach to quickly reduce field heat is to sprinkle cold water on the ground or wash fruits in water before storing them overnight in a tree basin for cooling. Before grading, wrapping, or packing in cartoons, the fruit surface must be dry. Sorting and grading: Unwanted fruits are separated after harvesting. To eliminate dust and spray residue, the healthy fruits are washed. Apple fruits are categorised based on their size, shape, colour. While grading, a mechanical grader may be used for grading quickly and effectively. Packing: After sorting and grading the apples are packed in wooden boxes.

Intercultural operation

Apples must be trained and pruned on schedule to ensure optimal growth and fruit quality. The rootstock vigour and growth habits determine the training of apple plants.For adequate lighting, typical apple trees are trained on a modified central leader system. This lessens the impact of hail and heavy snowfall while also enhancing the colour of apple fruit. The mid-hill circumstances that the spindle bush method is most suited for are high-density apple planting.

Mulching is done in order to conserve soil moisture.

Insect pest management

Woolly aphid, Eriosoma lanigerum

  1. Use rootstock that is resistant.
  2. Spray methyl demeton 25 EC 0.025% or dimethoate 30 EC 0.06%.
  3. It is advised to release the parasite Aphelinus mali.
  4. Application recommendations for predators include Chilomenus bijugus and Coccinella septumpunctata.

San Jose scale, Quadraspidiotus perniciosus

  1. Choose nursery stock that is scale-free.
  2. Utilise methyl bromide or HCN gas to fumigate nursery stock.
  3. Spray phosalone 50 EC 0.05% or fenitrothion 50 EC 0.05% throughout the summer.
  4. It is advised to spray 8–12 l of diesel oil emulsion per tree (diesel oil 4.5 l, soap 1 kg, water 54–72 l) over the winter.
  5. Aspidiotophagus sp. and Prospaltella perniciosi should be encouraged to proliferate.
  6. Chilocorus circumdatus, a coccinellid predator, should be released.

Cottony cushion scale, Icerya purchase

  1. Select nursery stock free scale infestation.
  2. Fumigate nursery stock with HCN gas or methyl bromide.
  3. Summer spray with phosalone 50 EC 0.05% or fenitrothion 50 EC  0.05%.
  4. Winter spray with diesel oil emulsion at 8-12 l/ tree ( diesel oil 4.5 l, soap 1 kg, water 54 -72 l) is recommended.
  5. Encourage the activity of parasitoids: Prospaltella perniciosi and Aspidiotophagus sp.
  6. Field release of coccinellid, Chilocorus circumdatus predator should be done.

 Stem borer, Apriona cinera

  1. Before the grubs reach the tree trunk, trim the branches where they are present.
  2. To kill the grub, inject 10 ml of monocrotophos 36 WSC and plug with moist clay.
Plant diseases management

Scab

  1. To stop the sexual cycle, clean cultivation, gathering, and removal of falling leaves and prunned materials should be done in the winter.
  2. Before blossoming, spray Tridemorph 0.1%.
  3. At the bearing stage, spray Mancozeb 0.25%.

Powdery mildew

To prevent the disease, spray Dinocap 0.05% or Chinomethionate 0.1%.

Fire blight

  1. Removal and eradication of the damaged parts.
  2. The removal of diseased twigs is advised.
  3. Use 500 ppm of streptomycin as a spray.

Soft rot

  1. Fruit handling should be done with caution.
  2. The best control is achieved by dipping fruit in Aureofungin sol @ 500 ppm for 20 minutes.

Bitter rot

  1. In the field, apply Mancozeb 0.25%.
  2. Mancozeb 0.25% treatment to suppress the disease during storage.