Since the beginning of April 2025, brown-throated pests have appeared and caused serious damage to acacia trees in Nghia Hanh commune, Tan Ky district, Nghe An province. Initial statistics show that about 150 hectares of the total 250 hectares of acacia forest in Nguyen Trai hamlet were attacked by worms, with a density of up to more than 300 trees/tree in some places.
Mr. Nguyen Dinh Hien - Secretary of the Nguyen Trai Hamlet Party Cell, said that his family has 11 hectares of acacia forest from 1 to 4 years old, which are currently in evidence, including newly planted acacia areas. Mr. Hien is concerned that if not treated promptly, brown-throated worms will eat the leaves of many areas of the people's acacia forest.
In that situation, the People's Committee of Tan Ky district has supported funding for renting drones and buying pesticides to urgently handle the area of about 60 hectares with high density of pests. The District Agricultural Service Center also sent staff to directly instruct people on the correct spraying technique. Initial records show positive results, the rate of young pests destroyed is over 90%.
Mr. Nguyen Van Trinh - Deputy Director of Tan Ky District Agricultural Service Center said that this is the most appropriate time to conduct spraying of young pests 1 (1-3 years old). Early treatment will help prevent deeply spread and minimize deep sources for the next phases. This unit recommends that people use biological drugs containing Bacillus thuringiensis or active ingredient Abamectin, Emmectin Benzoate. In particular, due to the high acacia tree characteristics, the use of drones or powder sprayers will help the drug cover the foliage evenly, increase the effectiveness of eradication.
Forest owners are also advised to proactively clean the forest regularly, clear forest dust, especially remove the dry thuc pham layer around the base of the tree - where the worm can take shelter. For glue over 3 years old, carrier hygiene is a simple but highly effective measure in preventing pests and diseases.