Navel orange orchard management techniques every navel orange grower must see

1. Adult orchard: 1. Fruit retention: (1) From after flower drop to the second physiological fruit drop period, spray the leaves 2 to 3 times with 0.15% Huangjia natural brassin 5000 times plus new-type nutrient liquid fertilizers such as Jin Kuizi L, P, K extract 500 times, Yelüling 500 times, etc.; (2) Remove summer shoots, removing them once every 7 to 10 days; (3) Continue pruning, mainly by thinning, to improve the ventilation and light conditions of the canopy, cut off dead branches and diseased and pest-infested branches, and reduce sources of disease and pest infection; (4) From mid-to-late May to early June, apply yellow-inhibiting ester to prevent navel yellow fruit drop.

2. Fruit thinning: In early June, thin out deformed fruit, diseased and pest-damaged fruit, densely clustered fruit, damaged fruit, wind-scarred fruit, and small fruit, so that the leaf-to-fruit ratio is roughly 60:1.

3. Bagging: In mid-to-late June, after applying pesticide solution to the canopy to control red spider mites, rust mites, canker, anthracnose, and other diseases and pests, promptly bag the fruit with special navel orange paper bags, one bag per fruit.

4. Drought prevention and drought resistance: (1) Spray the leaves once each with 500 times Handilong solution; (2) Do a good job of covering the tree dish. (3) Dig trenches in the soil and apply water-retaining resin 40 to 50 grams per plant to retain water and prevent drought.

5. Disease and pest control: Continue to control canker, anthracnose, red spider mites, rust mites, scale insects, leaf-rolling moths (leaf-silk worms), and swallowtail butterflies. (1) To control canker, the following agents may be selected: 1.5% Junlimie aqueous emulsion 1000 to 1200 times; 20% Yeqingshuang wettable powder 400 to 500 times; agricultural streptomycin 500 to 600 units plus 1% alcohol; medical streptomycin 10 to 15 kilograms 2% Xinzhiromycin 2000 times; 50% Daisen ammonium 600 times, 77% Keshade 1000 times. (2) To control anthracnose, the following agent may be selected: 1.5% Jun Daisen manganese zinc 800 times. (4) To control scale insects, spray pesticide once in mid-May, and the agents may be selected from: 99.1% Disichong 150 to 200 times, 25% Daoshijing 1500 to 2000 times, 25% Jiesijing 800 to 1000 times, Lesiben 1000 times. (5) To control leaf-rolling moths (hanging-silk worms) and swallowtail butterflies, the agents that may be selected include: 20% Sulaiting 2000 to 3000 times, Miesaoli 2000 to 3000 times, 1.8% Miechongling 5000 to 6000 times, Mieyouniao No. 3 1500 to 2000 times.

2. Young orchard: 1. Promote shoots and strengthen shoots: (1) 15 to 20 days before new shoots sprout, combined with shaping, use summer shoots to expand the canopy, and pinch the new shoots after leaving 8 to 10 leaves; (2) Apply 0.5 kilograms of Guomanduo biological organic fertilizer plus 0.05 kilograms of urea per plant, and spray Yelüling 500 times as a foliar supplement, or 0.3% urea plus 0.2 potassium dihydrogen phosphate.

2. Drought prevention and drought resistance: (1) Cut weeds in the orchard and cover the tree dish; (2) Spray the leaves with 500 times Handilong solution 2 to 3 times. (3) Dig trenches in the soil and apply “Kehan 98” water-retaining resin 10 to 20 grams per plant.

3. Disease and pest control: Mainly control leafminer moths, red spider mites, swallowtail butterflies, canker, and anthracnose. For control methods, refer to adult trees.