Black cutworms

In our experiments, black cutworm (Agrotls Ipsllon) (BCT7) larvae were fed corn seedlings and artificial diet. While there appear to be species of plants that are even more susceptible to BCTJ larvae than com, corn was not statistically different from the most susceptible species tested by Buschlng and Turpin (52), and certainly BCW can occasionally be extremely damaging to corn. Further, Wilson et al. (53), Tseng et al. (54), and Jarvis et al. (55) have screened thousands of maize introductions, inbred lines, and hybrids, and have found only a very few sources of even moderate resistance. 

Figure 3. Mean weights of black cutworm larvae fed Funk s G4507A corn seedlings and given a 48-h "boost" on artificial diet at various times during the experiment. Control larvae were fed artificial diet for the entire experiment. Each bar represents the mean of 20 larvae.

Black cutworms (Agrotls Ipsllon) were fed Pioneer 3368A corn seedlings (not known to be resistant) and artificial diet (8) (Table I). By the sixth day the weight gain of larvae fed seedlings was a small fraction of that for larvae reared on diet. 

Table I. Effects of Pioneer 3368A corn seedlings and artificial diet (8) on mean weights of black cutworm larvae-...

Table II. Effects of extracts of Pioneer 3368A corn seedlings on 10 day weights of black cutworm larvae. For weights, each extract bloassayed at 100% plant equivalency (PE) (same concentration as in intact plant). Residue bloassay at 90% of PE due to difficulty of incorporating into diet. Correlation coefficient is given for experiments performed over a range of concentrations (25 - 100% PE).

Table III. Effects of being fed artificial diet at various times during experimental period. Black cutworm larvae fed on Pioneer 3368A corn seedlings when they were not on diet.

Weights of black cutworm larvae which were placed on diet as eggs or larvae at various times after tryp-slnlzlng. 

Table V. Weight at 10 days of black cutworm larvae transferred...

Research supported by University of Delaware Research Foundation grant. Plant Defense to Insect Attack and Hatch Project 215, Host Plant Resistance to Black Cutworms in Corn. 

Gemeno, C., Lutfallah, A. F. and Haynes, K. F. (2000b). Pheromone blend variation and cross-attraction among populations of the black cutworm moth (Lepidoptera Noctuidae). Annals of the Entomological Society of America 93 1322-1328. 

Picimbon J. F. and Gadenne C. (2002) Evolution and noctuid pheromone binding proteins identification of PBP in the black cutworm moth, Agrotis ipsilon. Insect Biochem. Molec. Biol. 32, 839-846. 

Gadenne C., Renou M. and Sreng L. (1993) Hormonal control of pheromone responsiveness in the male black cutworm Agrotis ipsilon. Experientia 49, 721-724. 

Lepidoptera Black cutworm moth S (Agrotis ipsilon)... 

Gemeno C. and Haynes K. (1998) Chemical and behavioral evidence for a third pheromone component in a North American population of the black cutworm moth, Agrotis ipsilon. J. Chem. Ecol. 26, 329-342. 

Picimbon J. F. (1998) Sex pheromone of the French black cutworm moth, Agrotis ipsilon, identification and regulation by the Pheromone Biosynthesis Activating Neuropeptide (PB AN) and juvenile Hormone (JH). Misc. Publ. Natl. Inst. Seric. Entomol. Sci. 23, 104-105. 

Picimbon J. F., Gadenne C., Becard J. M., Clement J. Land Sreng L. (1997) Sex pheromone of the French black cutworm moth Agrotis ipsilon (Lepidoptera Noctuidae) identifcation and regulation of a multicomponent blend. J. Chem. Ecol. 23, 211-230. 

Finally the French workers have added a fourth reaction to the crystal toxin the negative. The insects—the black cutworm [Agrotis ipsilon (Hufnagel)], Euxoa segetum Schiff, Mamestra brassicae (L.), and Feridroma (Lycophotia) saucia Hubner—are not susceptible to the B. thuringiensis preparation (6). 

Black blister beetles. See Blister beetles, black Black cherry aphids, 67 Black cutworms. 286 Black-eyed Susan. See Rudbeckia hirta... 

Black cutworm, Agrotis ipsilon, 692 Budworm, western spruce, Choristoneura occidentalis, 31... 

Reese, J. C. and Beck, S. D. (1976a) Effects of allelochemics on the black cutworm, Agrotis ipsilon Effects of p-benzoquinone, hydroquinone, and duroquinone on larval growth, development, and utilization of food. Ann. ent. Soc. Am., 69, 59-67. 

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