Journal of Northern Agriculture ›› 2023, Vol. 51 ›› Issue (4): 64-71.doi: 10.12190/j.issn.2096-1197.2023.04.08

• Plant protection • Previous Articles     Next Articles

Indoor toxicity and field control efficacy test of different pesticides against Ditylenchus destructor Thorne

BAI Songlin1, HUO Hongli2, ZHANG Dongmei2, LU Qi3, YOU Junwen3, JI Yongxiang3, MIAO Chunle4, ZHANG Pengfei4, DAN Pengfei5, XI Xianmei2   

  1. 1. Inner Mongolia Agricultural University,Hohhot 010018,China
    2. Inner Mongolia Academy of Agricultural & Animal Husbandry Sciences,Hohhot 010031,China
    3. Otog Front Banner Agricultural and Animal Husbandry Technology Promotion Center,Otog Front Banner 016200,China
    4. Ordos Agricultural and Animal Husbandry Technology Promotion Center,Dongsheng 010700,China
    5. Xin′an Town Comprehensive Protection and Technology Promotion Center in Urad Front Banner of Bayannur,Urad Front Banner 015000,China
  • Received:2023-05-10 Online:2023-08-20 Published:2023-11-07

Abstract:

【Objective】Clarify the indoor toxicity and field control efficacy of common nematicides on Ditylenchus destructor Thorne,to screen for pesticides with high contact-killing activity.【Methods】Direct contact killing method was used to determine the indoor toxicity of five chemical agents on the adult and larvae of Ditylenchus destructor Thorne. And field control efficacy of the five chemical agents and three microecological preparations was measured.【Results】After diluting for 100 times and applied for 72 hours,the toxicity of 10% thiazophos granules to the adults and larvae of Ditylenchus destructor Thorne was the highest,with LC50 of 2.201 and 2.182 mg/L,respectively,followed by 41.7% fluoropyram suspension,with LC50 of 2.999 and 2.952 mg/L,respectively.Among the 5 chemical agents,20% thiazophos aqueous emulsion had the best control efficacy of 89.49%,while 41.7% fluoropyram suspension had the highest yield increase rate of 14.57%. Among the three microecological preparations,Bacillus TB918 liquid bacterial preparation had the best control efficacy of 48.20%,and the highest yield increase rate of 5.51%.【Conclusion】The corrected mortality rate of the 5 chemical agents on Ditylenchus destructor Thorne increased with the increase of the chemical concentration and application time. 20% thiazophos aqueous emulsion had the best field control efficacy against Ditylenchus destructor Thorne among the chemical agents,while the Bacillus TB918 liquid bacterial preparation had the highest field control efficacy among the microecological preparations.

Key words: Ditylenchus destructor Thorne, Chemical agent, Microecological preparation, Laboratory toxicity test, Control efficacy

CLC Number: 

  • S435.32