The diseases during the growth of jasmine include stalk rot and white peony disease. The pests include jasmine leafhopper, scale insect, and cinnabar.
(1) Jasmine stem rot. The disease occurs at the base of the stem. The initial lesion is a brown spot and water stain. The lesions expand longitudinally into strips. The edges are dark brown and gray-brown. The late-stage disease groups are rotted and cracked longitudinally and appear black granules. The disease will occur year-round during the greenhouse conservation period, especially in early spring. Outdoor maintenance also occurs from August to September. The occurrence of favorable diseases under high temperature and humidity conditions.
Control methods: 1 when the flowers on the basin, the use of 0.2-0.4 degrees of lime sulfur spray; 2 70% of Tuobu 600 to 1000 times can be coated lesions or painted branches, or with the US 500 pairs Double liquid, the effect is also good.
(2) Bilirrhea. The hazards and control methods of white peony disease can be seen in Clivia vaginalis.
(3) Jasmine Leafhopper. Jasmine leafhopper is one of Rongli's main pests. It eats jasmine leaves, buds, branchlets and shoots with larvae. The twigs die after being eaten, and the seedlings die after being killed, seriously affecting the growth and flowering of jasmine.
Control methods: 1 In the winter or early spring, clear the dead branches on the plants and the fallen leaves on the ground, and burn them in a concentrated manner; 8 Appropriately sparse leaves to facilitate ventilation; Manually catch and kill the eggs, larvae, and pupa on the leaves. 2 During the growth of jasmine, it can be sprayed with 50% trichlorfon WP 6000 times, which has a good control effect.
(4) Cinnabar leafhopper. Cinnabar leaf worm, also known as cotton red spider. It can harm many flowers and many greenhouse plants. Jasmine is one of the common victim flowers. The leaves of the damaged flowers appear yellow-white spots at the beginning, gradually turning red and then spreading to the whole leaves, causing the leaves to curl and yellow to fall off. This worm has developed rapidly and is seriously endangering its growth and flowering.
Control methods: Weeding and cleaning flower beds in winter and irrigation in nurseries can eliminate overwhelming insect sources. During the red spider's hazard period, 40% of dicofol EC can be used for 1500-2000 times (or 50% of Trichlorhydracum Wettable Powder 1500-2000 times spray control, spraying once every 7 days, Spray 2-3 times, the effect is good.When spraying, the back of the leaf should be sprayed, and pay attention to the middle and lower internal leaf litter of the sprayed plant.
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