Pests and control methods of Eustoma

Pests of Eustoma: Aphids

symptom

Aphids are the fastest reproducing insects, and can reproduce 10 to 30 generations a year. Female aphids can reproduce from birth and do not need males to reproduce.

Aphids use their mouth needles with sucking mouths to pierce the epidermis of plants and suck the juice from the tender leaves of the plants, causing the plants to grow slowly. The secretions of aphids also attract ants.

Prevention and treatment methods

When breeding, pay attention to regular ventilation and light transmission to prevent aphid infestation.

If the number is small, kill them manually and spray them with 1500 times diluted 80% DDT emulsion in the initial stage.

If diseased plants are found, they need to be removed and destroyed in a timely manner to prevent the pests from spreading further.

Pests of lisianthus: leaf roller

symptom

The adult leaf rollers have a strong tendency to sugar and vinegar. They hide on the back of leaves or in the grass during the day and come out at night.

The leaf roller has a small adult body and broad forewings. It hatches its larvae at the tip of the leaf and then eats the upper epidermis and mesophyll of the leaf, but leaves the lower epidermis, causing the leaves to curl, turn yellow, and develop filmy spots. Holes will appear after the adults bite.

Leaf rollers often appear in spring and summer. They hide in the leaves and continuously harm plants, seriously affecting their growth and causing delayed flowering or no flowering.

Prevention and treatment methods

When the number of leaf rollers is small, the leaves can be removed manually to eliminate the insects.

During the larval stage, you can use 1000 times diluted 75% phoxim to spray the larvae (preferably at night) or 1000 times diluted 90% trichlorfon to spray the larvae.

During the adult stage, use sweet and sour liquid to lure and kill them. Mix 5 parts of sugar, 5 parts of wine, and 80 parts of water, then put the sweet and sour liquid into a bottle and hang it near the plant.

Do not use dichlorvos for cleaning, as it will be harmful to the growth of lisianthus.