Detailed Explanation of Key Points of Virus-Free Fruit Tree Planting Technology

1 bag of Qinongsu (10 grams), 1 bag of 72% agricultural streptomycin (15 grams), 15 grams of copper sulfate, mix the three, add two liang of edible vinegar to foam and dissolve, then add 30 jin of water and spray or drench the roots. (Referred to as agricultural streptomycin copper sulfate mixed liquid). Then add 20 grams of zinc sulfate (zinc fertilizer), 20 grams of boric acid (boron fertilizer) (40 grams for root drenching) is better. Among them, for peach, plum, apricot (mei) and cherry, use 15 grams of copper sulfate before leaf unfolding, and do not use copper sulfate after leaf unfolding. For peach, plum, apricot (mei) and cherry, use 20 grams of boric acid before leaf unfolding, and 10 grams after leaf unfolding.

Spraying:

1. Spray 1-2 times from flower bud swelling to petal fall. The insect control effect is good. Do not add insecticide during full bloom, so as not to kill the pollinating bees and affect pollination and fertilization. If the number of flowers is small and weak, add 0.5-1 gram of gibberellic acid to the mixed liquid, which has a remarkable effect on enhancing flower production and pollination and fertilization. Pay attention to flower and fruit thinning.

2. In the small, medium and large fruit stages, use 1 bag of Qinongsu (10 grams), 40 grams of zinc sulfate, 50 grams of lime, add 2 liang of vinegar, stir, add 2-3 jin of water, to make chelated zinc calcium. Add the thick paste into the No. 3 agricultural streptomycin copper sulfate mixed liquid, and spray once each at the small fruit, medium fruit and large fruit stages, to supplement calcium, significantly prevent and control fruit cracking, fruit brown rot and rotten fruit, strengthen the prevention and control of various diseases and insect pests, and make the fruit glossy and bright.

3. For peach, plum, apricot, mei and cherry after leaf unfolding, do not use copper sulfate in the mixed liquid, use 10 grams of boric acid (boron fertilizer), add 2-3 jin of chelated zinc calcium, and spray once each at the small, medium and large fruit stages.

Root drenching

Add 50 grams of ferrous sulfate to the agricultural streptomycin copper sulfate mixed liquid, and drench the roots once each from flower bud swelling to petal fall and at the medium and large fruit stages. Among them, at the medium and large fruit formation stage, because too many fruits are set, too large and too heavy, root drenching must be done once to prevent fruit drop, and the effect of supplementing nutrition is remarkable. It prevents and controls yellowing disease of various fruit trees and significantly increases chlorophyll, including for citrus to prevent and control Huanglongbing, mainly by root drenching. In 7 days yellow leaves turn light green, and in 25 days they can change from yellow to dark green.

Can prevent and control viruses

Viral diseases (continuous cropping, premature aging, stunting, mosaic, leaf curl, yellow leaves, broken leaves, small leaves, bark cracking, fruit cracking, fruit shrinkage, Huanglongbing, jujube witches' broom, flower face, rusty fruit, persimmon witches' broom and pox disease, etc.), bacterial diseases (crown gall, citrus canker, angular leaf spot, etc.), fungal diseases (root rot, trunk rot, dieback, ring rot, scab, anthracnose, black spot, brown rot, gray mold, black spot, powdery mildew, downy mildew, rust, sooty mold, banana Panama disease, etc.), and comprehensive diseases (gummosis, apple moldy core, etc.). Astonishingly increases fruit yield, quality and sugar content.

Prevention and control of various insect pests

In the agricultural streptomycin copper sulfate mixed liquid, add 1-2 tubes of 20% Mieshaoli (fenpropathrin) (each tube 4 ml), 1-2 bags of 10% imidacloprid (each bag 10 grams), add 30 jin of water, and spray 1-2 times within 1-3 days. If the insect pest is severe, double the amount of insecticide. One spraying can keep the tree free of insects for several months (half a year).