Star-tree hibiscus and black locust whitefly are important pests of Qinglan because the change of weather status in recent years and the prevention and treatment of inappropriate control measures resulted in the occurrence of drug resistance. These two species of insects are very harmful to Qinglan. At night, light coal disease, fallen leaves, fallen flowers, and fruit drop will affect the quality of the fruit. In severe cases, plants may die. The integrated prevention and control measures for olive wood (powder) are now introduced below.
1. Do a good job in summer gardening and remove the winter insects: After the autumn shoots mature (from late November to early December), prune the weak branches, dead branches and diseased branches of the internal organs and block them; the plants spray to spray Wet, penetrating, optional drug 2.5% WP 1200 times. If there are insects or other codling moths, pay attention and prevent them.
2. Strengthen the treatment of tree water and fertilizer to create an effective fruiting effect: The quality of the mother tree is related to the damage level of wood (powder) in the following year. As the effect of the mother branch is not high quality, the spring shoots will be late the next year, different one, so that because the temperature rises, the shoot time is long, and the food source is wide, it will surely lead to the generation of wood (powder). If the effect is high quality (greater than 1 cm in thickness, the blade is thick, hard, moderate and glossy, and the leaves are dense and compact), the shoots are concentrated in the following year, and insects are not easily produced. It's basic.
3. Strive to put out artificially, delay the voicing and bring flowers spring shoots: under normal circumstances, the spring shoots of young trees are plucked before mid-March, and the middle and banyan trees are in mid-April, if the cessation time needs to be 4 In terms of months, according to the situation since 1999, accompanied by the larvae, the temperature rose rapidly, and in the dry spring and summer (from March to May), the wood (powdery) pods grew very quickly. The orchard with irrigation conditions can apply heavy fertilizer and irrigation before and after the beginning of spring to promote the sprung early spring shoots, avoiding the insect pests in the early stage of low temperature and drought. The amount of fertilizer can be used according to the purpose of production per 100 kilograms of Norwegian ternary compound fertilizer (15-15-15) 5 ~ 7 kg, such as summer buried soil miscellaneous fertilizer, can be properly eliminated the amount of compound fertilizer.
4. Chemical control: For the control of wood (powdery) maggots, pesticides with smaller insecticidal spectrum and strong selectivity should be selected. Now the drugs that are more fancy are decimated, fluttered (depleted), deuterated, and imidacloprid. Preparations, Wan Ling powder (water) agent and enemy killed or contact kill Kang. At the same time, when spraying, choose a machine with good atomization, spray evenly and thoroughly, focusing on the bottom leaf sector. Increase the batch (viscosity) agent when dispensing.
The woods (powders) are used to produce two ridges (spring and autumn shoots) and one ridge ridge (summer shoots, some orchards do not pump summer shoots), and targeted drugs and other pests are also targeted. Such as autumn shoots (from September to October), according to inspections in recent years, all areas of orchards have different levels of acute anthrax.
5. Pay attention to the cover and use of natural enemies: The main enemies of wood (powder) cockroaches are mainly ladybugs and ants, especially ants, because wood (powder) eel excrete honey juice to guide them, and the ant colony is prey on wood (powder). The eggs and young nymphs are used to reduce useful insect sources. Therefore, there is an ant nest in the tree and spraying is stopped when spraying.
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