Planting Tips

Chapter 58 What are the piercing and sucking pests that harm flowers?how to prevent
Piercing-sucking pests are a class of pests with piercing-sucking mouthparts.Its harmful feature is that its upper and lower jaw needles alternately penetrate into the stems and leaves of plants and suck the juice, resulting in poor plant growth and yellow leaves.The piercing and sucking pests that harm flowers are as follows.

(1) Aphids are commonly known as greasy insects and honey insects.It is a small blue-yellow worm. Its biggest characteristic in shape is that there is a abdominal tube on the left and right sides of the abdomen, so as to penetrate into the plant and suck the juice.Aphids are the carriers of many viral diseases, and can reproduce more than 10 generations a year, which is extremely harmful to plants.

Aphids often harm flowers such as cineraria, primrose, rose, pomegranate, chrysanthemum, and snapdragon.When aphids are found, you can place the potted flowers obliquely under tap water to rinse. This method not only repels the insects, but also achieves the purpose of cleaning the leaves. Generally, it only needs to be carried out 3 to 4 times to prevent the spread of aphids.The washing powder can be diluted to 400 times with water for spraying.The commonly used dimethoate 1500-fold dilution has the best effect.Pyrethrum, roten essence, etc. are also effective.

(2) The red spider is a small red insect, shaped like a spider, with 8 legs, which can be seen with the naked eye.Miscellaneous food habits, harmful to a variety of flowers, such as jasmine, evergreen, rose, kumquat, prickly pear and so on.The sap is sucked by the thorn-sucking mouthparts, causing yellow and white spots on the leaves, which extend to the whole leaf.If the damaged plants are found, they can be diluted and sprayed with the juice squeezed from green onion leaves, or sprayed continuously with water soaked in plant ash for 3 times, and then they can be eliminated.Also commonly used 1000 times dimethoate dilution or 40% dicofol EC 1000 to 1500 times spray to kill it.

(3) Scale insects are also known as scale insects.There are many types, with a body length of 5-6 mm. The body is covered with a white shell, or the whole body is covered with white ciliated waxy secretions (wax shell), and there are also yellowish brown, red, purple and other colors.Although the worms are small, they are numerous.It is fixed on a certain part of the flower's leaves, stems, flower buds, etc., sucks the juice of the flower with its mouthparts, and can also discharge sugary mucus at the same time, causing many diseases, such as coal pollution, etc., and in severe cases, the plant will die.There are more than 300 kinds of scale insects recorded in my country, and more than 100 kinds of harmful flowers are distributed all over the country.The common ones are cotton scales, shield scales, and wax scales.

Scale insect control is more difficult.First of all, it is necessary to strengthen plant quarantine to prevent the spread and transportation of seedlings with scale insects.Once scale insects are found, effective measures should be taken immediately to eliminate them.Secondly, artificial methods can be used to control.Combining flower and tree pruning, cut off insect branches and leaves, burn them together, or use brushes, bamboo chips and other tools to brush or scrape off insect bodies.Third, chemical methods can be used to control.The first instar nymphs (from just hatching to the early stage of wax production) can be killed with 40-50 times of 1000% omethoate or 1500% marathon emulsion, sprayed once every 7 days, and sprayed continuously for 2-3 times.

(4) Whiteflies are also called planthoppers.It is small and can fly. Its body is white or red, and its wings are covered with white wax powder, so it is also called "little white moth". After hatching from eggs, both larvae and adults suck the juice of plants with their mouthparts. There are many kinds of harm Flowers, such as fuchsia, pomegranate, chrysanthemum, rose, cineraria, petunia, geranium, hibiscus, etc.

The control method is the same as that of aphids.However, it will scatter when sprayed on adult insects, and it is difficult to remove. Therefore, washing powder or soapy water is added to the medicine to increase the adhesion, so that as soon as the medicine hits the insect body, it can adhere and produce medicinal effects.The formula for killing adults is: 80% dichlorvos 1000-1500 times liquid, add 1 grams of washing powder for every 10 liter of liquid medicine.Spray once every 7 to 10 days, several times in a row, to be effective.

(End of this chapter)