TAILIEUCHUNG - Nematicidal toxicity of native antagonists against Meloidogyne incognita

An experiment was conducted to study the nematicidal toxicity of native antagonists against Meloidogyne incognita. For this the native antagonists viz., Pseudomonas fluorescens, Bacillus megaterium, Azotobacter sp., Rhizobium sp., Purpureocillium lilacinum and Pochonia chlamydosporia were screened against Meloidogyne incognita under in-vitro conditions. For this, four different concentrations of culture filtrates viz., 25, 50, 75 100 percent were tested against M. incognita through egg hatch inhibition and second-stage juvenile’s mortality at 24, 48, 72 and 96 hrs of exposure time for each antagonist. The entire antagonists were also found to be effective in causing mortality of J2 with varying degrees at different concentrations of culture filtrates and at different exposure time. The relationship among the antagonists, concentration and time showed that all the tested antagonists were able to cause significant mortality of M. incognita J2with increase in the concentrations of filtrates and time of exposure. The result of in-vitro test reveals that all the tested antagonists showed varied nature of egg hatch inhibition and juvenile mortality of M. incognita. However, among the tested antagonists P. fluorescens was found to be most effective in causing the highest egg hatch inhibition and J2 mortality of M. incognita in 25, 50, 75 and 100 per cent concentration of culture filtrates at 24, 48, 72 and 96 hrs of exposure time. Further, probit analysis showed that culture filtrate of P. fluorescens exhibit either low LC50 values or less LT50 values against J2 of M. incognita in 25, 50, 75 and 100 percent concentration of culture filtrates at 24, 48, 72 and 96 hrs of exposure time as compared to the others antagonists and found to be best native antagonists against M. incognita. | Nematicidal toxicity of native antagonists against Meloidogyne incognita

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.