What should I do if there are little bloodworms on my orange tree?

This is the infestion of red spiders.

Citrus red spider, also known as citrus full-clawed mites, belongs to the leaf mite family Leaf Mites. It is currently one of the most harmful citrus pests. Adult mites and mites gather on leaves, young shoots, and peels, and puncture the epidermis with mouth needles to absorb juice, causing defoliation and fruit drop.

After the leaves are damaged, there are many small gray and white spots at first, which lose their luster, and when they are serious, the whole leaves are gray, and then gradually turn yellow and fall off early, affecting the tree potential and yield.

The number of generations of spider mites in a year is closely related to the temperature, and the suitable temperature for development and reproduction is 20-30, and 18-22 generations can occur when the average annual temperature is above 18. Eggs and some adult mites overwinter on the dorsal side of the leaves, on both sides of the main veins and in the crevices of the branches. It occurs seriously in spring and autumn in a year, and generally starts to harm in early March; After the spring shoots spread their leaves, a large number of red spiders on the old leaves migrated to the spring leaves of the current year to reproduce. From April to May, the insect population rises sharply, which is the peak period; From June to July, if the average temperature exceeds 25, the insect population decreases rapidly, and the high temperature in summer is not conducive to the growth and development of red spiders, and the insect population is in the low peak period; From September to October, the temperature gradually drops, and the insect population rises again, harming the autumn shoots; If there is a prolonged drought in autumn, the population density will still rise, but it will be less than in spring. In winter, red spiders often lay diapause eggs and accumulate insect sources, and in case of warm and little rain in winter, the overwintering mites die less, and the overwintering base is large, which often leads to the early and rampant occurrence of red spiders in the next spring; Natural enemies include predatory mites, lacewings, ladybugs, flower bugs, parasitic fungi, etc.

The prevention and control methods are as follows:

The following agents with good effect, long residual effect, and low toxicity to natural enemies and humans and animals can be used: 1% avermectin emulsifiable concentrate 2000 times; 50% Tork WP 1500-2000 times liquid (suitable for application 1 week before the peak of pest mites above 20 temperatures); 2000-4000 times of 73% gmite emulsifiable concentrate; 1000-2000 times of 5% Nisolan EC (nymph population density is larger, 800-1000 times 40% hydrothional dilution can be added and sprayed at the same time); 25% Beleba WP 1000-2000 times liquid; 1000-2000 times of 20% Dadiling wettable powder.

Domestic orange trees can also be painted with a brush dipped in cigarette butt water or sprayed with insecticides.

Spray! Insect killer medicine!

The bugs on the orange trees are scale insects. Scale insects are pests of citrus and other fruit trees, in early spring after the sap begins to flow, the scale insects begin to feed, after the female adults lay eggs, after a few days can hatch a waxy scale shell of mobile insects, is the first hatching larvae. The larvae crawl on ornamental plants, and after finding a suitable place, they pierce their mouthparts into the body of the flowering plant, suck the sap, and begin to settle the life, causing the host plant to lose nutrients and a large amount of water.

The bugs on the orange trees are scale insects. Scale insects are pests of citrus and other fruit trees, in early spring after the sap begins to flow, the scale insects begin to feed, after the female adults lay eggs, after a few days can hatch a waxy scale shell of mobile insects, is the first hatching larvae. The larvae crawl on ornamental plants, and after finding a suitable place, they pierce their mouthparts into the body of the flowering plant, suck the sap, and begin to settle the life, causing the host plant to lose nutrients and a large amount of water.

In addition to transparent insects, carefully check whether there are small lumps growing on the trunk or leaves, if they can be scraped off, they are scale insects, and the control methods are as follows:

1. Mosquito coil: After the mosquito coil is lit, hang it on the plant with insects, cover the plant and flower pot with a plastic bag, and the aphids will be eliminated after 1 hour.

2. Wind oil essence: Wind oil essence can kill aphid insects by adding water 400 to 500 times. Bi Qingru.

My kumquat tree is covered with this red thing, what kind of insect is this? How to deal with it?

Spider mites suck the sap on the back of the leaf and form a silk web. In the early stage, there are scattered green spots on the leaf surface, and when the white dots are all over the leaves, the leaf surface becomes grayish-white, and finally the leaves dry up and fall off, and the plant is prematurely senescent.

Soak the citrus peel with water about 10 times for a day and night, filter and spray the plants, and also control aphids, such as watering flowers to control nematodes in the soil. 2。15 grams of laundry detergent, 15 ml of 20% sodium hydroxide, kilograms of water, spray after mixing the three, check after 1-2 days, the mortality rate of adult mites and mites of red spiders is 94% 98%.

3。Take 50 grams of grass and trees to rent ears and ashes, add 2500 grams of water and stir thoroughly, soak for two days and nights to filter, add 3 grams of laundry detergent and spray after mixing thoroughly, once a day, for 3 consecutive days, every 1 week.

Suspected spider mites.

Red spider is a mite, also known as leaf mites, commonly known as red spiders or fire dragons, short whiskered mites, is a common disease on flowers, specifically for the damage to flower leaves, flowers, and a wide range of distribution, the host is very common: including herbaceous, woody, fruit trees and bonsai in the wild elm, finch plum, five pine needles will be harmed by it. The body of the red spider is very small, only the size of a needle tip, less than 1 mm, round or oval, the body is orange, reddish-brown, etc., only a small red dot to the naked eye, and the orange-red transparent spherical eggs can be seen under a magnifying glass.

In home flower raising, the following methods can be used to control spider mites:

1) Soak the citrus peel with water about 10 times for a day and night, filter and spray the plants, which can also control aphids, such as watering flowers to control nematodes in the soil.

2) 15 grams of laundry detergent, 15 ml of 20% sodium hydroxide, kilogram of water, spray after mixing the three, check after 1-2 days, the mortality rate of adult mites and mites of red spider is 94% 98%.

3) Take 50 grams of plant ash, add 2500 grams of water and stir fully, soak for two days and nights to filter, add 3 grams of laundry detergent and spray evenly, once a day, for 3 consecutive days, and spray for 3 days every 1 week, which can eliminate the second generation of pests, and can also control aphids, scale insects and other stinging and sucking pests. Put it in the soil to control maggots.

4) Light a plate of mosquito coils, put them in the pots of diseased plants, and then tie them tightly with plastic bags, after about 1 hour of smoke, both eggs and adults can be killed.

5) Ginger liquid: take ginger and mash it into a puree, add 20 times of water and soak it for 12 hours, filter it and spray it with filtrate to prevent and control leaf spot, coal stain disease, rot disease, black spot disease, etc., as well as aphids, red spiders and leaf miners.

Larvae of citrus butterflies.

Control methods] 1) Manually kill larvae and pupa.

2) Protect and release predators. In order to protect the natural enemies, the pupa can be placed in a sarong and placed in the garden, and the host bee will fly out after feathering and then parasitize.

3) Pharmaceutical prevention and control. It can be sprayed at the larval stage with 1000-2000 times per gram of 30 billion spore green worm powder or 1500 times of 40% dichlorphenifia emulsifiable concentrate, 1000-1500 times of 40% chrysanthemum emulsifiable concentrate, 800-1000 times of 90% trichlorfon crystals, 2000 times of 10% bromine emulsifiable concentrate, 80% dichlorvos or 50% pyroxine or 45% malathion emulsifiable concentrate.

What a beautiful worm, why do you want to get rid of it?