The truth about the strange butterfly species that harms oranges in Con Cuong
(Baonghean.vn) - According to Mr. Tran Quoc Thanh - Director of the Department of Science and Technology, the butterfly that harms oranges in Con Cuong is not actually a strange butterfly, but this is a type of butterfly that local people have rarely seen.
Nghe An specialty orange growing area attacked by strange butterflies, fruits wilt and fall in large numbers
(Baonghean.vn) - Although harvest day is approaching, orange growers in Con Cuong district (Nghe An) are having a "headache" because they are being attacked by a strange type of butterfly, causing oranges to fall off in large numbers.
The strange butterfly that harms oranges in Con Cuong is called the fruit-sucking moth, with the scientific name Othreis fullonia, and specializes in sucking sweet fruits such as oranges, tangerines, grapefruits,...
About harm:The pricked fruit is difficult to detect when it is new. After a few days, the sting will darken, creating a dark halo around it. It loves large, thin-skinned, juicy fruits. When food is scarce, it can sting even young fruits.
The sting creates yellow spots on the fruit. Damaged fruit is often dry and hard, without water. Severe damage can rot and fall off.
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| He sucked the fruit and the symptoms after he bit the harmful fruit. |
Morphological characteristics of the sucking moth:
- The above moths have in common the following characteristics: large body, strong flight, large chest and abdomen, and covered with long feathers. Adult moths have a body length of 35-37 mm, wingspan of 85-95 mm. Dark color, on the wings there are many large spots of different shapes and colors.
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| Strange butterfly species only attacks oranges at night. Photo courtesy of Quang An |
The hind wings are usually orange-yellow, with a dark brown margin, and a C-shaped spot in the middle of the hind wings, varying in size depending on the species. The sucking proboscis is developed into long, strong needles, adapted for piercing through hard, thick shells. When not feeding, the proboscis is usually curled under the head, but when feeding, it can extend straight, more than 2 cm long.
- Newly hatched larvae are light green, later they are dark brown, with 2 white dots on their backs.
- The pupa is black.
Measures to manage the injection:
- Clean the garden, kill vines (secondary hosts).
- Use a net to catch and kill adult insects at night, between 6 and 10 p.m.
- During the fruit ripening season, you can use a net or lamp to catch the moths.
- Use fruit packaging.
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| Using fruit wrapping to protect oranges. Photo courtesy |
- Use ripe and fragrant fruits like bananas and pineapples soaked in honey and pesticides to make traps to catch moths.
- Use residues soaked in pesticides with little or no odor so as not to affect the scent of the bait trap. Pay attention to placing traps on trees at the edge of the garden.
- Spray products containing active ingredients Emamectin or Lufenuron to kill larvae (worms).
