KẾT QUẢ NGHIÊN CỨU BIỆN PHÁP QUẢN LÝ TỔNG HỢP BỆNH HÉO KHÔ ĐẦU LÁ DỨA (Ananas comosus)

The studies were conducted at Plant Protection Division of SOFRI and pineapple growing areas in Tan Phuoc Dist., Tien Giang. The experiments were isolated Paecilomyces fungi and test their parasitization ability on pineapple mealybug and the results shown that there were two strains could be control mealy bug (A - RS M and P - RCC). In other investigation, we aimed to find suitable medium for mass multiplication, results shown that rice powder medium was the best on and could control mealy at the rate of 30-40g per 10 liters of water which could kill over 46-50% of Pseudococcus on pineapple only at 7 days after treating under laboratory conditions. The product was named as SOFRI-Paecilomyces, which could be used for further studies. The experiment to control mealybug (Dysmicoccus spp.) and ants by using SOFRI-tru kien bait revealed that all treatment of Regent, Dantotsu and Success were given same results which could control ants in pineapple. For field demonstration model, the obtained results shown that SOFRI-tru kien bait and SOFRI-Paecilomyces could control mealybugs and ants well leading to reduce the disease incidence and delay the wilt disease symptoms.