The Latest Technical Methods and Tutorial for Okra Pest and Disease Control

Okra prefers warmth and originated in India, and is widely cultivated in tropical and subtropical regions. In China, the cultivated area is also very extensive in provinces such as Hunan, Hubei and Guangdong, and it has long been known as the "king of vegetables", with extremely high economic use and edible value. Below, let us take a look together at the pest and disease control techniques for okra!

Phytophthora blight

[Damage characteristics] Okra can be infected at the seedling stage and the adult plant stage. When the seedlings grow beyond 20 cm, the phytophthora blight lesions spread from the leaves to the main stem, making the stem thinner and faded, until the whole plant wilts or collapses. Leaf infection mostly starts from the leaf tip or leaf edge on the lower part of the plant. In the early stage of the disease, the lesions are dark green, water-soaked and irregular in shape, and after expansion they turn brown.

[Control method] Seize the early stage of the disease and spray once every 7-10 days with 72% mancozeb, cymoxanil WP (Curzate) 500 times dilution, or 69% dimethomorph-mancozeb WP 900 times dilution, or 64% oxadixyl-mancozeb WP 400 times dilution, or 58% metalaxyl, mancozeb WP 500 times dilution, for 2-3 treatments.

Viral disease

[Damage characteristics] Viral disease is the main disease in okra production, and the disease is more severe at the adult plant stage than at the seedling stage. After the plant is infected, the whole plant is affected, especially the tender leaves at the top are very obviously affected. The leaves show mosaic or brown mottled patterns. If infected early, the plant is stunted, and bears few or no fruits.

[Control method] Do not save seeds from diseased fields, select disease-resistant varieties, and at the early stage of the disease use 5% juntaqing WP 400-500 times dilution, or 20% virus A WP 400 times dilution, or 15% zhibingling 1000 times dilution, or 83% zengkangji 100 times dilution for 3 treatments, once every 7-10 days.

Venomous caterpillars

[Damage characteristics] Venomous caterpillars mainly damage okra at the seedling stage. They often feed on the leaf mesophyll after emergence, causing notches, and in severe cases only the leaf veins remain.

[Control method] Spray with 10% chlorfenapyr EC 1500 times dilution, or 5% fipronil SC 1500 times dilution, or avermectin EC + fenvalerate EC 3000 times dilution.

American leafminer

[Damage characteristics] Damage can occur throughout the entire growth period of okra, mainly damaging the leaves.

[Control method] It can be controlled with 1.8% abamectin EC 5000 times dilution, or 52.25% nongdile EC 1000 times dilution, or 48% lesiben EC 1000 times dilution, or 5% fipronil SC 800 times dilution.

Aphids

[Damage characteristics] They can occur throughout the entire growth period of okra, with heavier damage at the adult plant stage.

[Control method] Imidacloprid-type pesticides can be used, such as 10% yibianjing, 10% yashijing, 10% dagongchen, etc., at 3000 times dilution.

Ants

[Damage characteristics] After okra blooms, ants often gather on the floral organs to cause damage.

[Control method] Spray with 48% lesiben EC 1000 times dilution, or 5% fipronil EC 1500 times dilution, or mix sawdust with a 0.3% fipronil solution and scatter it where ants appear to trap and kill them.

Cutworms

[Damage characteristics] Cutworms hide by day and come out at night. At the seedling stage they often bite through the main stem, causing broken seedlings.

[Control method] Generally, a sugar-vinegar solution is commonly used to lure and capture them, or they are captured by digging in the soil early in the morning. Specialized pesticides can also be used to kill them.