There are black lice in the fresh osmanthus flowers, can you still use it?

No, this should be the blackthorn whitefly, also known as the orange whitefly, which is widely distributed in eastern, central, southern and southwestern provinces and cities, especially in southwest China.

More severe. In addition to harming osmanthus, it also harms citrus, loquat, yueji, persimmon, pear, tea, camphor, willow, grape, and chongyang wood.

Lilacs, banyan trees.

and nearly 40 species of plants.

To become, nymphs.

Sucking juice is harmful, and in severe cases, a large amount of honey is secreted, which drops down the lower leaf surface in the form of dewdrops, which induces coal stain disease, resulting in black leaf pollution, affecting the growth of osmanthus and landscape advantages. Adults are millimeters long, their heads and thorax brown, covered with thin white powder; Abdomen orange-yellow. Compound eyes orange-red.

forewings greyish-brown with 7 irregular white markings; Hindwings pale brownish-purple, smaller, without markings. The egg is about mm long, oval, with a small stalk at the base, and the surface of the egg shell is densely reticulated with hexagonal lines; Milky white at the time of first birth, gradually turning pale yellow, and turning purple-brown when near hatching.

The larvae hatch flattened, oval, yellowish, about mm long, with a serrated body circumference and 4 tail hairs at the end of the tail. After fixation, the body gradually turns brown to black-brown, the antennae and feet gradually disappear, the body margin secretes white wax, and there are 6 pairs of prickly hairs on the dorsal body of the body. The 2nd instar larvae are dark black, with obvious white waxy margins around the periphery, visible ventral segments, and dorsal spines.

Hair 10 pairs. At the 3rd instar, the body is about millimeters long, black, shiny, and has 14 pairs of prickly hairs on the back. Pupae shells are lacquered black, shiny, broadly oval, and the body length is millimeters.

It has a white cotton-like waxy edge, and there is a raised longitudinal ridge on the back. Adults have 4 pairs of spines on the dorsal surface of the thorax and 10 pairs of spines on the abdomen. There are 11 pairs of females and 10 pairs of males in the submarginal area, erect upwards.

The tubular foramen is prominently raised, heart-shaped.

Spraying medications: Spraying agents such as Uranus or Emilor every seven to ten days. Biological control:

Release lice natural enemies such as ladybugs and lacewings in the Guiyuan Garden. Physical control: Use the strong tropism of white lice to yellow, and bury sticky yellow boards next to trees.

Maintenance methods: Strengthen garden cleaning and pruning work to improve ventilation and light transmittance.

1. Spray drugs

When the white lice on the osmanthus have a high density and serious harm, but there are few natural enemies, chemical agents can be used to spray and kill, and the time is selected in the adult stage or larval incubation period, and the agent can be used Uranus, Emilor or Actet, etc., and it needs to be sprayed once every seven to ten days, and it can be sprayed three to four times in a row.

2. Biological control

When osmanthus is infested by white lice, biological control methods can be used to control it, and natural enemies of lice can be released in the osmanthus garden forest, such as ladybugs, lacewings, parasitic wasps such as Aphid and Yellow Aphid, which can effectively control white lice, and cause little harm to plants and the ecological environment.

3. Physical prevention and control

Using the strong tropism of white lice to yellow, bury yellow wooden boards or plastic boards next to the osmanthus tree, and apply sticky oil on the board, and then shake the osmanthus branches to promote the adults to fly to the yellow spot to play the role of booby-trapping, in addition, you can use a vacuum cleaner to catch the adults to reduce the density of white lice.

4. Maintenance method

In order to prevent osmanthus from suffering from the harm of white lice, it is necessary to pay attention to check whether there are whitefly insects on the back of the leaves when introducing seedlings, fundamentally eliminate the invasion of pests, and strengthen the garden cleaning work and the pruning of diseased and insect branches and diseased and weak branches, so as to improve the ventilation and light transmittance between plants.

(1) It is necessary to pay attention to plant quarantine work.

When introducing seedlings, pay attention to check whether there are whitefly insects on the back of the leaves to prevent the invasion of such pests.

2) Pay attention to the work of clearing the garden.

It is necessary to strengthen the clearing work of cultivating and weeding in the forest land and the pruning work such as pruning and removing insect pest branches, weak branches, and long branches, so as to improve the ventilation and light transmission conditions of the forest land and restore the growth of trees.

3) Carry out biological control measures. Protect and utilize whitefly predators such as ladybugs, lacewings, parasitic wasps such as Aphid and Yellow Aphid wasps.

4) Physical control. The whitefly has a strong tendency to yellow, so you can bury yellow wooden or plastic boards next to the osmanthus tree. The board is coated with sticky oil, and then the osmanthus branches are vibrated to promote the adults to fly and stick to the yellow board, which plays a trapping role and can also be used to vacuum cleaner to suck and capture the adults to reduce the density of the insect population.

5) Pharmaceutical prevention and control.

When the population density of pests is high, the damage is serious and the natural enemies are few, chemical spraying can be used. Spraying should be carried out in the adult stage and larval incubation period, the agent can be used Uranus 1000 times liquid, avermectin (7051) insecticide 2000 times liquid, Emilal 30000 times liquid or Actet 10000 times liquid, etc., in case of overlapping generations, it is necessary to spray once every 7 10 days, spray 3 4 times continuously.

Go to a flower shop or pesticide store to buy dimethoate, and spray the whole plant according to the instructions for use or the dosage taught by the boss to kill insects.

Caution: This medicine is toxic and used with caution.

What is Osmanthus? Cat or dog? I used to use dichlorvos thinner (dilution by myself), but now dichlorvos can't be bought, or sprinkle camphor powder on the body and wrap it in a bag for half an hour (so that he can't lick his hair) and then wash it.

Go to a pet store or animal hospital to buy an insecticide for a few dollars, and solve the problem perfectly Veterinarian.com.

Go to a flower shop or pesticide store to buy dimethoate and spray the whole plant according to the instructions for use or the amount taught by the boss to kill insects, this medicine is toxic and used carefully.

The lice that my friend said should be a scale insect on the osmanthus flower, and if it is not serious, use chlorpyrifos, avermectin and other insecticides, and if it is serious, it must be treated with scales!