The planting density of pomegranate is adjusted according to its variety, tree shape and site conditions. If pomegranate is planted in a mountainous slope with poor soil, shallow soil layer and poor irrigation conditions, the plant spacing can generally be controlled at 2-3m×3-4m, and if it is planted in a plain area with fertile soil, thick soil layer and abundant water resources, the plant spacing can be about 3×3m-3×4m.
For example, the plant spacing of varieties with lush foliage and scattered branches in Mount Tai is generally 3×4m, while the plant spacing of varieties with erect branches such as Lintong red sweet pomegranate is 2-3m× 3-4m. The plastic density of a single trunk can be controlled at about 2×3m, and that of 2-3 trunks should be controlled at about 3×4m.
Common diseases and insect pests in pomegranate planting and control of pomegranate stem window moth
This pest mainly harms pomegranate branches, and the general control methods are as follows: at the beginning of July every year, you should check your familiarity. If branches or treetops damaged by pests are found, they should be cut off immediately to kill the larvae inside; After the pomegranate tree begins to sprout in spring, all the dead branches without leaves should be cut off and burned to kill the overwintering larvae.
Generally, 500-fold solution of dichlorvos or 800-fold solution of enemy horses are used to discharge the insect larvae in the branches of 2-3 years old from the bottom, and then the insect mouths are blocked with mud to kill the larvae.
The newly hatched larvae can not eat into the branches until 2-3 days later. Therefore, at the peak of pest incubation period, spraying 40% omethoate, 50% methamidophos or 40% monocrotophos 1500 times in time to prevent the larvae from being injected into the treetops can generally achieve 84.9-98.4% control effect.
In addition to the above methods, you can also spray drugs directly on the seedlings, which will have better efficacy than injecting them from insect mouths, and can also prevent the harm of other leaf-eating pests such as yellow thorn moths to the seedlings to a certain extent. Generally, it will be better to spray the medicine for the first time and then spray it for the second time in about 20 days.