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Quanzhou Net, April 18 (Financial Media Reporter Chen Minghua Guo Fangrong Text/Picture) A huge "spider web" is suspected of appearing in Dehua, and the Quanzhou Evening News report has attracted widespread attention. Yesterday morning, the staff of the Dehua County Forestry Bureau carefully identified the site and determined that these webs were not spider webs, but inchworm webs.
At the junction of Xunzhong Town and Leifeng Town in Dehua, standing on the side of the road, you can see a "giant net" in the shape of a circle on the trees at the foot of the mountain below the road. Walking through a vegetable field, more than ten meters away from the "giant net", you can find many caterpillars crawling on the power lines above the vegetable field, and they are crawling forward one by one, and the silk they spit out is hung everywhere.
There are also quite a few inchworms on the wires
The reporter approached the "giant net" and found that the net was crawling with caterpillars of all sizes, and the insect silk seemed to be the "highway" of these caterpillars, and they could complete the high-altitude crossing between the branches through these silk threads. The leaves covered in the nets have been eaten away.
Rising temperatures cause inchworms to hatch en masse, and they gather together to form a "giant web".
"Look, there's a bird eating bugs. The staff of the Dehua County Forestry Bureau pointed to a few small birds that flew to peck at the caterpillars and said that a large number of caterpillars made it easy for the birds to have a full meal. According to the staff, these small birds with olive green feathers are called collared birdbills, which are omnivorous birds, and their diet is mainly plants, but also eats insects and their larvae.
"Spider silk is very sticky, and this silk is basically not sticky. "The staff carefully identified the webs on the spot and determined that they were not spider webs, but inchworm webs. This net is like the "home" of the inchworm, which plays a role in defense and cleaning, and is not used for predation. Relevant experts explained that the reason for the emergence of so many inchworms is likely to be due to the recent sudden rise in temperature, a large number of inchworms hatched collectively, gathered together to form such a "giant net".
According to Lin Guisen, head of the Disaster Prevention and Mitigation Center of the Dehua County Forestry Bureau, the inchworm is a general term for the larvae of the lepidopteran inchmoth family, which is an agricultural pest that harms fruit trees, tea trees, mulberry trees, cotton and forest trees, etc., and will seriously damage or damage trees. It is not yet known what kind of insect the inchworm is, but it will be confirmed after it has been bred into an inchworm.
Subsequently, the staff of the Dehua County Forestry Bureau used biological control methods to spray Bacillus thuringiensis onto the net. This strain produces two types of toxins, endotoxin (associated cell crystals) and exotoxins, which stop the pests from feeding, and the pests die from starvation, blood spoilage, and neurotoxicity.
Editor in charge: Lin Rong