The wonderful use of mineral oil in citrus, the prevention and control of red spiders, mesozoans, ulcer disease, soot disease and so on

Mineral oil is a commonly used agent on citrus, a broad spectrum of control, can be used as an insecticide, fungicide, compound synergy, usually mixed with other agents, the effect is better.

Mineral oil controls citrus pests

The mechanism of mineral oil insecticidalism is physical asphyxia and behavioral changes, forming an oil film on the surface of the insect body or egg shell, causing the insect infestation to suffocate and die. By penetrating the egg shell, interfering with the metabolism and respiratory system of the egg, the purpose of egg killing is achieved.

1. Control of red spiders

Winter Qingyuan: mineral oil (150 to 200 times) + alkyne mite;

Note: After picking to before the buds, it is not suitable to use this scheme after the buds of flowers and spring shoots.

Fruit expansion stage: mineral oil (200 to 350 times) + avermectin;

Note: In addition to controlling red spiders, it can also control other insect pests, such as rusty ticks, whiteflies, aphids, etc., avoiding the use of young shoots (buds) and high temperatures.

Fruit expansion stage: mineral oil (200 to 350 times) + avi spironate,

Note: For orchards where red spiders are more difficult to control, a suspension dosage form of avyl spirant ester is selected to avoid the young shoot (bud) stage and high temperature.

2. Control of mesozoans

Mesophyllum is a relatively difficult insect pest, some orchards use chlorpyrifos, thiazide, ethyl spiranter ester are difficult to control, you can use mineral oil + chlorpyrifos.

Scheme: Mineral oil (150 to 300 times) + chlorpyrifos

Description: At the same time, it can be controlled, such as aphids, wood lice, whiteflies and other insect pests; to avoid flowering, young shoots (buds), young fruit stage, coloring period, ripening period, high temperature use; a small number of fruit trees have, it is best to use a back test sprayer to spray alone.

Mineral oil controls citrus diseases

As a fungicide, mineral oil can destroy the cell wall of pathogens, interfere with their respiration, and interfere with the attachment of pathogens to host plants. It also controls mycelium and prevents spore germination and infection.

3. Prevention and control of ulcer disease

The expansion stage of fruit (summer and autumn) is the most difficult stage for the prevention and control of ulcer disease, and the fruit orchard with the effect of copper preparation alone is not satisfactory, and mineral oil and copper preparation can be used to prevent and control.

Fruit expansion stage: mineral oil (200 to 350 times) + copper preparation

Instructions: Avoid spraying at the shoot (bud) stage and at high temperatures.

4. Prevention and treatment of soot disease/moss

In the case of soot disease or serious moss, ordinary sterilization is more difficult to beat, and in winter Qingyuan can be added with mineral oil and allicin.

Winter Qingyuan: Mineral oil + ethosin

Note: Use after picking to before the buds, and should not use this scheme after the buds and spring shoots sprout.

Fruit expansion stage: allicin + methyl tolbuzine

Description: Mainly sprayed with soot or moss, avoid the young shoot (bud) stage, high temperature use.

Summary of the use of mineral oil on citrus:

1, flowering period, young shoots (buds) stage, coloring period, high temperature (more than 33 degrees), severe drought, weak tree potential, do not use.

2. After the preparation of the medicinal solution, it should be stirred evenly, and stirred once every 15 minutes or so. 【Disclaimer】The content of this article, personal views, for reference only!