Diseases and Control of Illicium verum L.

Chlorosis

Chlorosis is a common disease of star anise plate. When chlorosis occurs, the leaves will fade green and turn yellow. There are many reasons for the occurrence of yellowing in star anise gold plate, which may be caused by iron deficiency or other reasons. generally, when breeding, we need to strengthen management and reasonable fertilization, which can treat chlorosis.

Leaf spot disease

The leaf spot disease of star anise gold plate mostly occurs in summer, which mainly harms the leaves, leading to the continuous expansion of the disease spots on the leaves, and even lead to leaf wilt.

The occurrence of leaf spot disease in star anise gold plate is mostly caused by bacteria, and the spores of the bacteria are spread by wind and rain. Generally, star anise gold plate is easy to develop in high temperature, muggy and humid environment. In the management, we need to pay attention to strengthen ventilation, apply more organic fertilizer, and destroy the withered leaves of star anise plate in time.

If leaf spot occurs, you can spray some carbendazim solution for treatment.

Coal pollution disease

Coal fouling disease is a very harmful disease, which is generally caused by bacteria. Germs can overwinter on diseased leaves, or spread by pests and Rain Water, and are easy to break out in the high-temperature and rainy season of summer and autumn. Coal fouling disease can harm the leaves and branches of star anise. When white occurs, it needs to be taken without fog in time, and some carbendazim solution should be sprayed to prevent and cure it.

Anthrax

Anthracnose of star anise gold plate can harm leaf petiole and fruit stalk and cause disease spot. In the occurrence of anthrax, to timely cut off diseased branches, diseased leaves, or chemical control, timely spraying, you can use the two agents to spray cross.

What are the diseases of star anise gold plate and how to prevent and cure them?

Star anise gold plate is a very popular indoor greening plant, because it is evergreen all the year round, the flowers are also very beautiful, and the ornamental value is very good. It is a very good choice to cultivate a star anise plate indoors to green the indoor environment. The following editor will introduce to you what are the star anise gold plate diseases and how to prevent and cure them.

Star anise gold plate chlorosis

Star anise gold plate chlorosis refers to the phenomenon that some or all of the stems and leaves turn green and appear yellowing or yellow greening. There are many causes of yellowing, among which the more common one is iron deficiency yellowing, which is generally solved by strengthening cultivation management, rational fertilization and other measures.

Star anise leaf spot

Star anise leaf spot mostly occurs in summer, causing damage to leaves. The disease spot occurs from the leaf tip or leaf edge, and it is light brown at the beginning, and then expands to form irregular spots, grayish brown to reddish brown, with dark brown coils on the edge. The disease spot can dry up the whole leaf 1, 1, 3, 1, 2, and many small black particles are scattered on the disease spot. The pathogen overwinters with mycelia and conidia in diseased leaves and fallen leaves. The conidia produced in the following year became the primary infection, and the spores were transmitted by wind and rain. The optimum temperature for the development of the pathogen was about 27 ℃. High temperature, high temperature, humid and muggy environment, poor shade and ventilation, weak plant growth, are conducive to the disease, strengthen cultivation management, increase the application of organic fertilizer, and remove the fallen leaves deeply buried or burned in winter. Spray at the initial stage of the disease, 1Vera 2VL 100 times lime Bordeaux solution, or 50% carbendazim 800 times, azine 500 times solution.

Star anise Jinpan coal pollution disease

The coal fouling disease of Illicium verticillum is a subphylum of fungi. The hyphae are dark brown, beaded and prostrate on the leaf surface. The conidia are in various forms, unicellular, bicellular or brick-like. The conidium is erect, long stick-shaped, 280-455 microns long and 42-50 microns wide. The conidium is also nearly spherical with a diameter of 49-70 microns. The pathogen overwintered on diseased leaves and branches with hyphae. Spread by shell insects and wind and rain. After the occurrence of a large number of shell insect larvae in June, the mucus secretions excreted by them were used as nutrition to induce a large number of coal fouling bacteria. The peak period of scale insect damage is from late June to early and middle September, when high temperature and high temperature are beneficial to the occurrence of the disease. Mainly damage leaves and branches. The front of the leaf, branches and petioles are covered with a layer of black pulverized coal, affecting photosynthesis. Pulverized coal can sometimes peel off or be washed away by torrential rain. The coal pollution disease should be wiped off with a clean cotton cloth in time, and fungicides such as 600-800 times of 25% carbendazim wettable powder, 800 times of 50% carbendazim, or 600 times of 70% zinc should be sprayed to prevent and control the disease.

Star anise scab anthracnose

Star anise scab anthracnose is a new symptom of star anise anthracnose, which can harm leaves, veins, petioles and fruit stalks. The typical symptoms of leaf lesions are gray-white on the front, slightly thickened in scabies, round verrucous protrusions on the back, and cracking in the middle of the lesion. The first control method is to cut off the diseased plants and leaves in time to reduce pathogens, and the second is chemical control. The commonly used agents are 25% carbendazim (bromogeranil) EC 500 times or 80% anthrax Fumei 800 times, spraying plants once every 2 weeks, 3-4 times can be basically controlled, the control effect of cross use of the two agents will be better.

Prevention and control of diseases and insect pests in star anise

Star anise gold plate, is an evergreen shrub of Araliaceae, with large alternate leaves, star palm-shaped lobed leaves, thick, glossy, serrated or wavy edges. Umbels set into terminal panicles with white flowers. The florescence is from October to November. The berries are globose, purplish black, covered with white powder and mature in May of the following year. When planting, it can be propagated by sowing, cutting or dividing plants. The main results are as follows: 1. Through observation, we found that there were yellow-brown spots on the leaves, petioles and stems of the star anise gold plate, and the disease spots on the leaves were round, and then enlarged into irregular patches. After reaching a certain number, the leaves began to curl and wither. At the same time, we also found that the spot was contagious, and the octagonal gold plate on the edge of the diseased plant was also infected with spots. Through observation, search for information, and consult experts, we know that star anise gold plate has anthracnose. 2. Prevention and treatment of anthracnose in star anise. Regular spraying of Bordeaux solution or 1000-fold spray of carbendazim wettable powder. In addition, the seriously infected plants and leaves can be thoroughly cut off and burned in different places. 3. The methods of preventing and controlling the harm of shell insects: A. the first occurrence is the occurrence of spot pieces, and the insect branches are thoroughly cut off and burned or brushed artificially to remove the insect source. B, before the nymph secretes wax powder shell in the period of dispersion and metastasis, the chemical control is more beneficial. In order to improve the insecticidal effect, it is best to mix 0.1-0.2% washing powder into the liquid. Available agents: (a) pyrethroids: 2.5% enemy killing or kung fu EC or 20% EC 4000 ml / kg, 20% butyl EC 3000-4000 times, 10% cyhaloester EC 1000-2000 times. (B) organophosphorus insecticides: 1500-2000 times of 50% monocrotophos or parathion or internally absorbed phosphorus EC, 1000 times of 50% malathion or fenitrothion or Daofengsan EC, 40% omethoate or dimethoate or dimethoate EC or 50% dichlorvos EC 800m ethyl chloride. (C) during the damage period, combined with the control of other juice-sucking pests, internal insecticides can be used to bandage tree trunks, and 20-50 times solution such as monocrotophos or omethoate or internal phosphorus absorption has a good effect.