Selection of Beauveria spp. isolates for control of the termite Heterotermes tenuis (Hagen, 1858)

被引:28
作者
Almeida, JEM
Alves, SB
Pereira, RM
机构
[1] Univ Florida, Dept Entomol & Nematol, Gainesville, FL 32611 USA
[2] Univ Sao Paulo, ESALQ, Dept Entomol, BR-13418990 Piracicaba, SP, Brazil
来源
JOURNAL OF APPLIED ENTOMOLOGY-ZEITSCHRIFT FUR ANGEWANDTE ENTOMOLOGIE | 1997年 / 121卷 / 9-10期
关键词
D O I
10.1111/j.1439-0418.1997.tb01446.x
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Heterotermes tenuis is an important pest in sugarcane in Brazil, where alternative control methods are necessary due to cancellations of chemical pesticide registrations. Experiments were conducted to determine the pathogenicity, virulence and mass production yields of Beauveria spp. isolates as potential microbial control candidates for H. tenuis. Results demonstrated that the average virulence of the B. brongniartii isolates was comparable to that of B. bassiana isolates. Isolates obtained from soil were as effective as microbial control agents as those obtained directly from insect hosts. However, no B. brongniartii or soil isolate was among those best isolates selected, which included two of the three termite isolates tested. LT50 for 15 selected isolates varied between 2.91 and 4.91 days, and termite mortalities caused by these isolates were between 78.7 and 98.7% after 8 days. Significant differences were observed among these selected isolates. Conidial productions on artificial media (PDA and cooked rice) correlated well for the selected isolates. However, spore production on the termite cadavers did not correlate with production on these artificial media. The most productive isolate on cadavers (634) was 21% more productive than the second best isolate (447), and was also a good conidial producer on artificial media with 25% lower conidial yield than the best producer (756). The least productive isolate on cadavers or artificial medium (760) produced only 3% of production by isolate 756 on cooked rice and 45% of production on termite cadavers. Because high conidial production on cadavers is a desirable characteristic to facilitate transmission of the disease in the nest, isolate 634 was selected for further development as microbial agent for H. tenuis control.
引用
收藏
页码:539 / 543
页数:5
相关论文
共 9 条
[1]  
ALVES S.B., 1989, ECOSSISTEMA, V14, P188
[2]  
Fernandes P. M., 1991, AN ENT SOC BRASIL, V20, P45
[3]  
Fernandes Paulo M., 1992, Anais da Sociedade Entomologica do Brasil, V21, P125
[4]  
HANEL H, 1982, Z ANGEW ENTOMOL, V94, P237
[5]  
HANEL H, 1982, Z ANGEW ENTOMOL, V92, P9
[6]   Virulence of seven isolates of Beauveria bassiana and Metarhizium anisopliae to Coptotermes formosanus (Isoptera: Rhinotermitidae) [J].
Jones, WE ;
Grace, JK ;
Tamashiro, M .
ENVIRONMENTAL ENTOMOLOGY, 1996, 25 (02) :481-487
[7]   TERMITE PATHOGENS - TRANSFER OF THE ENTOMOPATHOGEN METARHIZIUM-ANISOPLIAE BETWEEN RETICULITERMES SP TERMITES [J].
KRAMM, KR ;
WEST, DF ;
ROCKENBACH, PG .
JOURNAL OF INVERTEBRATE PATHOLOGY, 1982, 40 (01) :1-6
[8]   PATHOGENICITY OF 6 STRAINS OF ENTOMOGENOUS FUNGI TO COPTOTERMES-FORMOSANUS (ISOPTERA, RHINOTERMITIDAE) [J].
LAI, PY ;
TAMASHIRO, M ;
FUJII, JK .
JOURNAL OF INVERTEBRATE PATHOLOGY, 1982, 39 (01) :1-5
[9]  
NOVARETTI WRT, 1985, B TECNICO COPERSUCAR, V38