Insect pest of Dryopteris Dryopteris-scale insects

1. Reason 1: untimely pruning

When withered leaves are found in the maintenance process, Dryopteris should be cut off in time to keep the plant fresh and beautiful and conducive to the germination of new leaves, otherwise too messy and crowded branches and leaves will lead to weak growth, yellow leaves and withered leaves.

Treatment method: when the clump of fern leaves is too dense, the old leaves can be pruned properly every autumn.

2. Reason 2: discomfort of basin soil.

Dryopteris needs to change the basin every spring, like loose, permeable, fertile calcareous sandy loam, change the basin should pay attention to the choice of soil, if the soil is not suitable, it is easy to cause the leaves of Dryopteris to yellowing and withering.

Treatment: clematis like calcium fertilizer, separate plants to change the basin can be added to the basin with a small amount of lime and broken eggshell, add some calcium fertilizer.

3. Reason 3: improper watering

Dryopteris should be fully watered and maintain high air humidity during the growth period to keep the leaves dark green. If the water supply is insufficient or the air is dry, the leaves will turn yellow or wither.

Treatment: during the peak growing season, Dryopteris should spray water on the branches and leaves for 2 or 3 times a day.

4. Reason 4: improper lighting

Dryopteris Dryopteris belongs to shade plants, such as strong light, it is easy to cause scorched leaf margin and yellow leaves.

Treatment: Dryopteris should pay attention to shade in outdoor training, but also need to provide sufficient sunlight, in indoor, it is best to keep the flowerpot on the east or north windowsill of the room.

Like Dryopteris Dryopteris, it has a great influence on the ornamental and normal growth of Dryopteris Dryopteris. Here are the symptoms and control methods of its common diseases and pests.

How to control diseases and insect pests of Dryopteris Dryopteris and control methods of diseases and insect pests of Dryopteris

The flower language of Dryopteris is no regrets, because its stem is slender and the color is like black, so it is named "the black hair of a young girl". It's like a girl with no regrets waiting quietly. However, there are always some problems that affect the beauty in the process of breeding. So how to control the diseases and insect pests of Dryopteris? The following is to introduce the prevention and control methods of diseases and insect pests of Dryopteris.

How to control diseases and insect pests of Dryopteris Dryopteris and control methods of diseases and insect pests of Dryopteris

1. Scale insects are common pests. In a warm and humid environment, it is easy to occur when there is poor ventilation.

Prevention and treatment method: 3% carbofuran granules or 15% Tiemiake granules are buried in the matrix around the root, and 2-5 grams are generally applied in the basin with the size of 2u cm. It can also be sprayed with 1000 times of omethoate EC in the nymph stage. For other methods, see the cycad pest control section.

two。 Leaf blight is mainly harmful to leaves and is a common disease.

Prevention and treatment methods: properly reduce the air humidity, pay attention to ventilation and light transmission. Spray 200 times Bordeaux solution or 50% carbendazim wettable powder 500 times 600 times at the initial stage of the disease, once every 10 days, 2-3 times continuously.

Common diseases and insect pests of Dryopteris and their control methods

Insect pest of Dryopteris Dryopteris-scale insects

Symptom

Shell insects are common pests of Dryopteris Dryopteris, which are easy to occur in warm, humid and poorly ventilated conditions. When the disease occurs, it can be seen that there are white protuberances on the leaves, the leaves will droop and wither, and in serious cases, the whole leaves will be scorched yellow.

Prevention and cure method

There are many leaves of Dryopteris, so it is difficult to check the scale insects on each leaf, so the leaves are cut off directly when the scale insects are found.

Drug control can be used in the soil around the roots of insecticides (flowers and birds are sold in the market), usually 10 to 15 centimeters and 2 to 5 grams. Or spray omethoate EC 1000 times solution at the time of onset, spray once every 5-7 days, and spray 2-3 times continuously.

Dryopteris Dryopteris disease-leaf blight

Symptom

The phenomenon of yellowing and scorched edges of leaves often occurs in the process of maintenance, and the reason for improper maintenance is to suffer from bacterial infection, resulting in the yellowing of your leaves. At the time of onset, the leaves appeared yellowish-brown disease spots, with the expansion of the disease spots, gradually fused, and then the leaves wilted.

Prevention and cure method

Strengthen maintenance, if the leaves appear yellowish-brown spots, need to appropriately reduce air humidity, pay attention to ventilation and light transmission.

When the disease occurs, timely spraying agents, Bordeaux liquid and carbendazim wettable powder brake can be selected, spraying once every 10 days and spraying continuously for 2 or 3 times will improve.