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Nut entry by 1st summer generation pecan nut casebearer acrobasis nuxuorella

, : Nut entry by 1st summer generation pecan nut casebearer acrobasis nuxuorella. Southwestern Entomologist 9(1): 13-21

The fates of insecticide-free pecan nut [Carya illinoensis] cohorts were determined by regular examination during May and June in pecan orchards near College Station, Texas [USA] during 1979-1981. The larvae of 1st summer generation pecan nut casebearer (PNC) destroyed 7.9-39.5% of the nuts depending on the location and year. Nut disappearance from nut clusters uninfested by PNC ranged from 14.4-46.9% and these losses generally occurred after the PNC attack period. Comparisons between losses due to PNC and nut disappearance indicated the events were independent. The actual damage due to PNC was less than the apparent damage by an amount equivalent to the level of nut disappearance experienced by the particular nut cohort being examined. The PNC population required about 1200 degree-days (average daily temperature, from initial nut entry until the last nut was infested. Data indicate that PNC infest nut clusters regardless of cluster size and infest nuts irrespective of their spatial position in the cluster. Infested nuts were characterized by the site of nut entry occurring at the proximal end of the nut adjacent to the peduncle on > 90% of the nuts and on the nut surface facing the distal end of the peduncle on .apprx. 75% of the nuts. The mean number of nuts destroyed per cluster and nuts undamaged per cluster in nut clusters infested by larvae of the PNC ranged from 1.76 to 2.6 and 0.3 to 3.1, respectively.

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Related references

Ring, D.R.; Harris, M.K., 1984: Nut entry by 1st summer generation pecan nut casebearer. The fates of insecticide-free cohorts of pecan nut were determined by regular examination during May and June in orchards near College Station, Texas, during 1979-81. The larvae of the 1st summer generation of Acrobasis nuxvorella Neunzig destroye...

Aguirre, L.A.; Tucuch, M.; Harris, M.K., 1995: Oviposition and nut entry behavior of the pecan nut casebearer Acrobasis nuxvorella Nuenzig. Oviposition behavior of overwintered generation females and nut entry by first summer generation larvae of the pecan nut casebearer, Acrobasis nuxvorella Neunzig, were studied near San Buenaventura, Coahuila, Mexico. Overwintered generation female...

Hill, S.O., 1940: Pecan Foliage as Food for the Pecan Nut Casebearer Acrobasis caryae Grote. With a view to explaining the survival of the larvae of Acrobasis caryae, Grote, in seasons in which there are no nuts on the pecan trees, laboratory experiments were carried out in Florida in the summers of 1938 and 1939 to determine whether this...

Calcote, V.; Hyder, D., 1980: Second chance on control of pecan nut casebearer Acrobasis nuxvorella. Proceedings annual conference Texas Pecan Growers Association8(58): 45-46

Reid W.; Dinkins R.L.; Harris M.K., 1984: Predicting the development of the pecan nut casebearer acrobasis nuxvorella in southeastern kansas usa. First-generation pecan nut casebearer larvae, A. nuxvorella Neunzig, damaged 6.0-20.5% of pecan [Carya illinoensis] nut clusters monitored in 1979-1983. A prediction model based on degree days and developed for College Station, Texas, was tested w...

Emilie A.H.rtfield; Marvin K.H.rris; Raul F.M.dina, 2012: Population structure of the pecan nut casebearer Acrobasis nuxvorella throughout its geographical distribution. 1The pecan nut casebearer Acrobasis nuxvorella Neunzig (Lepidoptera: Pyralidae) is an important, monophagous pest of pecan Carya illinoinensis (Fagales: Juglandaceae).2This pest is native from Louisiana west to the eastern edge of New Mexico and n...

Heinriches, E.A., 1968: The pecan nut casebearer, Acrobasis caryae on mockernut hickory, Carya tomentosa. The presence of an A. caryae (Grote) larva in the terminal portion of the petiole apparently prevents the 3 terminal leaflets from developing normally. Larvae were present in the petioles from early spring until May 29. Four hymenopterous parasite...

Hall, M.; Shelton, R., 1982: Pecan nut casebearer control on Louisiana pecans, 1980 Acrobasis nuxvorella. Insecticide and acaricide tests(7): 59

Anonymous, 2012: Mating Disruption of Pecan Nut Casebearer, Acrobasis nuxvorella Neuzig, in Pecans. Mating disruption of pecan nut casebearer, <i>Acrobasis nuxvorella</i> Neuzig, was evaluated using the single component sex pheromone, (9<i>E</i>,11Z)-hexadecadienal in four field experiments in commercial orchards of pecan...

Passaro, L.C.; Webster, F.X., 2003: Synthesis of (9E,11Z)-hexadeca-9,11-dienal, sex pheromone of the pecan nut casebearer, Acrobasis nuxvorella (Neunzig). The pecan nut casebearer, Acrobasis nuxvorella, is a significant pest of the pecan nut industry. Two alternative syntheses of (9E,11Z)-hexadeca-9,11-dienal, the sex pheromone of the pecan nut casebearer, are described. The key transformation in ea...