Red SpiderIt mainly harms the back of leaves. Prevention and control methods: After discovery, wash the whole plant with water, and then spray the mite-killing agent, such as Mite-Clean, Mite-Keeper, etc. WhiteflyIt mainly parasitizes on the back of leaves, piercing into the leaf flesh to suck its juice, which will cause the leaves to curl, turn green and yellow, or even dry up and fall off. Prevention and control methods: Spray with 1500 to 2000 times diluted 25% cypermethrin wettable powder, and spray again after 15 days depending on the insect situation, or spray with 2000 times diluted 10% imidacloprid wettable powder. As long as the adults and larvae are killed, the dirty mold layer on it will soon disappear as you increase ventilation and light, and spray water repeatedly. Under home cultivation conditions, when the adult insects are flying around, you can try spraying them with mosquito repellent, then gently wipe off the mold layer on them with a wet cloth, strengthen water and fertilizer management, and the plants will quickly recover. Scale insectsIt mainly harms stems, petioles, etc., and has different sizes, colors, and shapes, such as round and oval. Prevention and control methods: You can use a toothbrush to brush it off or wipe it clean with a rag, or you can spray laundry detergent, wind oil, or pesticides such as cypermethrin for prevention and control. Root-knot nematode diseaseWhen observing the above-ground part of the disease, the leaves initially grow weak, reddish-brown spots appear on the edges and spread inward, and later the leaves dry up and fall off. If you observe from the underground part, you will find large and small nodules appearing between the roots of the plant. They are smooth and flesh-colored at first, and rough and brown in the later stage. |
<<: What to do if rosemary has bugs
1. Maintenance methods 1. Temperature: It has rel...
1. Caused by moisture During normal watering, if ...
1. Dosage Nutrition experts recommend eating abou...
The role of Hypericum: ornamental Hypericum, Hype...
Can sesame be grown hydroponically? Sesame is an ...
1. Taboo groups 1. Pregnant women: Pregnant women...
base fertilizer: Before planting peonies, base fe...
Rainbow Jade cutting rooting time The best time f...
1. Flower language and meaning Tea tree is a beau...
1. Whether to release water Baby's breath nee...
1. Soil When planting double-petaled plum, loose,...
Tiger Pira is a very shade-tolerant plant with st...
Origin of the name The leaves of D. crassifolia a...
Succulent plant repotting time Succulent plants n...
Shading In summer, orchids like to grow in a cool...