When planting grapefruit, we can prevent diseases and insect pests by cleaning the orchard and reasonable fertilization. Clearing the orchard can clean up the eggs of pests and diseases that spend the winter in the soil and directly destroy the growth environment of pests. Reasonable fertilization can improve the growth of grapefruit. When they grow better, the incidence rate of insect pests will be reduced. In addition, when planting grape oil, it is best to plant it in an area with mild climate, sufficient humidity and light. This is not prone to pests. 1、 How to prevent insects in grapefruit 1. Clean the orchard: when clearing the orchard in winter, spray 800 times of high fat film solution on the soil, and then turn over the ground deeply. This can destroy the growth environment of diseases and insect pests and prevent diseases and insect pests to a great extent.
2. Rational fertilization: during the growth of grapefruit, apply more phosphorus and calcium fertilizer. It can supplement the nutrients needed for their growth, improve the disease resistance of crops and reduce the incidence of diseases and pests. 2、 How to maintain grapefruit 1. Soil: grapefruit is very inclusive of soil, but it is best to choose sandy loam with deep and fertile soil layer and strong drainage for planting. The pH of soil should be between 5.0-6.5.
2. Moisture: the annual precipitation for planting grapefruit should be kept between 800-1000 mm. If the precipitation conditions cannot be met, appropriate irrigation can be carried out, so that the growth of grapefruit will become better.
3. Light: grapefruit is a shade tolerant and light resistant crop. The annual light of grapefruit is between 1000-25000 lux, and the sunshine duration is 1500 hours a year.
4. Temperature: as a tropical and subtropical fruit tree, grapefruit has poor cold resistance, and the most suitable planting temperature is above 19 ℃. If the temperature continues below 0 ℃, it is likely to suffer from freezing injury, so thermal insulation measures must be taken in advance. （PuTaoYouZenMeFangChong）