Prevention and treatment of peach ball
In recent years, peach balls have occurred seriously in the nectarine orchard of our town, the light trees are weak, the output is declining, the heavy ones are dead, even dead trees. For this reason, we have carried out pesticide screening and control for 2 consecutive years, and the results are very good, which are summarized as follows:
1. Strengthen the comprehensive management measures of fertilizer and water, keep the trees strong, ventilated and transparent, and pay attention to the protection of natural enemies.
two。 Before sprouting, in the first and middle of March, the wax on the body surface of overwintering nymphs is still less, so timely control can achieve better results. When the 5-degree stone-sulfur mixture was selected, the mortality rate of the insect population was 98.1%. You can also use 80 times engine oil emulsion with a little washing powder, and the mortality rate of the worm is more than 90%. The above agents have no damage to natural enemies. If the number of natural enemies is small and has no protective value, 500 times omethoate can be mixed with 50 times kerosene, and the mortality rate of insect population is 95.3%. With methamidophos 500 times plus a little detergent, the mortality rate was 98%.
3. When 0.3 degree stone sulfur mixture was sprayed once during the peak incubation period of peach balls (May 18-20), the mortality rate of the insect population was 95%. Or with 1000 times of 80% dichlorvos emulsion, the mortality rate was 90.5%.
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Cultivation techniques of Jinmei jujube, the best of jujube
Jinmei jujube is a new especially late-maturing jujube variety cultivated by Nanyang Jujube Research Institute in Henan Province. It has won the National Science and Technology Gold Award for many times. Jinmei jujube fruit is large, round, the maturity is golden red, similar to Li Mei. The average single fruit weight is 30g, the maximum fruit weight is 100g, the color is bright, clean and beautiful, the skin is thin and meat is crisp, tender and juicy, sweet as honey, rich aroma and excellent quality. The edible rate of Jinmei jujube is 96.4%, the moisture content is 65.4%, and contains 32.2% soluble matter. It is praised as "national treasure" by domestic experts and "east" by international friends.
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Prevention and treatment of bacterial perforation in peach
(1) harmful symptoms. Peach bacterial perforation mainly harms peach leaves, but also infects shoots and fruits. After the injury of the leaves, there are nearly round or irregular brown disease spots, which gradually dry up and fall off to form perforation, so it is called perforation disease. In severe cases, several disease spots are often connected to form scorched and strong spots, which dry up most of the leaves and cause early defoliation, so the disease is also called early defoliation disease of peach trees. (2) Prevention and control methods. ① strengthens the comprehensive management of Taoyuan. Increase the application of organic fertilizer and avoid
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