Pecan nut casebearer, Acrobasis nuxvorella Neunzig parasites collected inDona Ana County, NM, and El Paso County, TX

摘要

Pecan nut casebearer (PNC), Acrobasis nuxvorella Neunzig, were collected in the Mesilla Valley, Dofia Ana county, New Mexico, and El Paso County, El Paso, Texas, during 1999 and 2000 growing seasons for laboratory studies. Parasitoids were collected and identified from several PNC collected in the field. Twenty-two specimens of Bassus acrobasidis Cushman (=Agathis acrobasidis) (Hymenoptera: Braconidae) were found in Dofia Ana County from PNC collected in the field. Only one specimen was found in 1999, and the remaining were found in 2000. Thirty-three percent of the PNC collected during the second generation on one farm contained B. acrobasidis. B. acrobasidis has been reported in New Mexico (Krombein et al. 1979), and also released for PNC control in Chaparral, New Mexico, in 1992 (Carrillo and Ellington unpublished data). Five specimens of Brachymeria hammeri (Crawford) (Hymenoptera: Chalcididae) were found in Dofia Ana County in 2000 from PNC collected in the field. Less than 2 percent of the field collected PNC were parasitized. Four of the specimens were found in the overwintering generation and the other in the second generation of PNC. B. hammeri has not previously been reported from New Mexico. B. hammeri is a known PNC parasite in Texas (Krombein et al. 1979; M.K. Harris and T.-X. Li 1991, personal communication).