Location: Crop Genetics ResearchTitle: Assessment of the effects of Hirsutella minnesotensis on Soybean Cyst Nematode and growth of soybean) Author
Submitted to: Soybean Science
Publication Type: Peer reviewed journal
Publication Acceptance Date: 12/19/2010
Publication Date: 4/25/2011
Citation: Qian, H., Li, S., Xu, Y., Li, C., Sun, Y. 2011. Assessment of the effects of Hirsutella minnesotensis on Soybean Cyst Nematode and growth of soybean. Soybean Science. 30(2):266-271. Interpretive Summary: Soybean cyst nematode (SCN) is one of the diseases causing the most soybean yield loss in the world. Identification of potential biological control agent for SCN would be an important alternative approach to control this disease in addition to development of cultivars resistant to SCN. In this study, the effects of Hirsutella minnesotensis, a mold that can parasitize SCN, on SCN and the growth of soybean were analyzed under greenhouse conditions. This mold increased soybean fresh weights and reduced the number of SCN and has potential to be a biocontrol agent for SCN.
Technical Abstract: Hirsutella minnesotensis is a fungal endoparasite of nematodes juvenile and parasitizes soybean cyst nematodes (SCN) with high frequency. In this study, the effects of two H. minnesotensis isolates on population and distribution of SCN and growth of soybean were evaluated. Experiments were conducted using 0.4 g of fresh mycelium/300 cm3 autoclaved soil (per pot) against soybean cyst nematode (9,000 eggs /300 cm3 soil) in the greenhouse. Thirty-five days after inoculation on soybean, H. minnesotensis isolates 1-10 and HLJ07-21-3 increased soybean fresh weights by 30.98% and 27.66%, respectively. Inoculation with H. minnesotensis also significantly (P = 0.05) reduced the number of nematode eggs and the number of females on the root and cysts in the soil. Use of the isolates significantly (P < 0.05) decreased the densities of total eggs in the pot by 63.7% and 46.7% when compared with no H. minnesotensis treatment. The total number of nematodes (sum of eggs and J2) were reduced by 43.6% and 35.8% as compared with no H. minnesotensis. Isolate1-10 more efficiently reduced the nematode population than isolate HLJ07-21-3.