Characterization of Predation on Egg Masses of Ostrinia nubilalis (Lepidoptera: Pyralidae)

1990 ◽  
Vol 83 (3) ◽  
pp. 482-486 ◽  
Author(s):  
D. A. Andow
Keyword(s):  
Ostrinia Nubilalis ◽  
Egg Masses ◽  
Lepidoptera Pyralidae

MIGRATION OF LARVAE OF OSTRINIA NUBILALIS (LEPIDOPTERA: PYRALIDAE) INFECTED WITH NOSEMA PYRAUSTA (MICROSPORIDA: NOSEMATIDAE) AND SUBSEQUENT DISSEMINATION OF THIS MICROSPORIDIUM

1978 ◽  
Vol 110 (9) ◽  
pp. 897-900 ◽  
Author(s):  
L. C. Lewis
Keyword(s):  
Ostrinia Nubilalis ◽  
Intensity Of Infection ◽  
Egg Masses ◽  
Lepidoptera Pyralidae

AbstractInfections of Nosema pyrausta (Paillot 1927) Kotlan 1928, in egg masses of Ostrinia nubilalis (Hübner) used to artificially infest maize did not significantly decrease the ability of the infected larvae to migrate to adjacent plants. When 25% of the egg masses placed on the plants contained N. pyrausta, the resulting larvae had an incidence and an intensity of infection significantly greater than those of the controls. If 100, 75, 50, and 25% of the infesting eggs were infected by N. pyrausta, the number of larvae per plant were reduced by 72.0, 44.0, 29.3, and 38.7% respectively. N. pyrausta was transmitted via contaminated frass. The result was a reduction in populations of O. nubilalis larvae.

Partial characterization of proteinase activity in the larval midgut of the European corn borer, Ostrinia nubilalis Hübner (Lepidoptera: Pyralidae)

1989 ◽  
Vol 67 (4) ◽  
pp. 864-868 ◽  
Author(s):  
Jon G. Houseman ◽  
B. J. R. Philogène ◽  
A. E. R. Downe
Keyword(s):  
Ethyl Ester ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Alimentary Tract ◽  
Maximal Activity ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
Chymotryptic Activity ◽  
Hydrolysis Of

Protease activity in the alimentary tract of the European corn borer, Ostrinia nubilalis, can be attributed to at least three endoproteinases. A high alkaline trypsin with maximal hydrolysis of benzoyl arginine p-nitroanilide at pH values higher than 10.0, a low alkaline trypsin with maximal activity against benzoyl arginine ethyl ester at pH 9.0, and chymotrypsin, which hydrolyzed benzoyl tryosine ethyl ester at pH 7.5–8.0, were detected in gut homogenates. Total proteolysis, measured using azocasein, had maximal activity at pH 10.0 or higher. Corn borer chymotryptic activity had characteristics similar to the vertebrate enzyme. Both tryptic activities differed from vertebrate trypsin by being insensitive to ovomucoid trypsin inhibitor. High and low alkaline trypsin differed from each other by their pH optima. High alkaline trypsin was activated by magnesium and calcium, and low alkaline trypsin was not affected by inclusion of either chemical in the assay mixture.

scholarly journals The location of egg masses of Ostrinia nubilalis [Lepidoptera : Pyralidae] on potato plants

2005 ◽  
Vol 76 (3) ◽  
pp. 123-126
Author(s):  
A.P. Dornan ◽  
J.G. Stewart
Keyword(s):  
Ostrinia Nubilalis ◽  
Prince Edward Island ◽  
European Corn Borer ◽  
Total Surface Area ◽  
Sampling Time ◽  
Corn Borer ◽  
Egg Masses ◽  
Potato Plants ◽  
The People ◽  
Lepidoptera Pyralidae

The location of egg masses of the European corn borer, Ostrinia nubilalis, was studied on potatoes (Solanum tuberosum) “Russet Burbank” grown on Prince-Edward-Island, Canada, from 1990 to 1992. The within-plant positions of 315 egg masses were characterized by the examination of approximately 3700 plants. Ninety-two percent of the egg masses were found on the bottom two-thirds of the plants and 95% were found on the underside of the leaflets and on the stalks. In total, 88% of the egg masses were found on the bottom two-thirds of the plants on both the stalks and the underside of the leaflets. Sampling time can be optimized if the people engaged in scouting programs concentrate their efforts on the bottom two-thirds of the stalks alone, which represents only 3.7% of the total surface area of the haulm but contains 50% of the egg masses.

POPULATION DYNAMICS OF THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HÜBNER)(LEPIDOPTERA: PYRALIDAE) ATTACKING POTATOES IN PRINCE EDWARD ISLAND

1995 ◽  
Vol 127 (2) ◽  
pp. 255-262 ◽  
Author(s):  
Andrew P. Dornan ◽  
Jeff G. Stewart
Keyword(s):  
Population Dynamics ◽  
Ostrinia Nubilalis ◽  
Prince Edward Island ◽  
European Corn Borer ◽  
Corn Borer ◽  
Egg Masses ◽  
Potato Plants ◽  
Important Pest ◽  
First Occurrence ◽  
Lepidoptera Pyralidae

AbstractThe population dynamics of the European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Pyralidae), were documented on potatoes grown in Prince Edward Island (P.E.I.) from 1990 to 1992. By comparing degree-day accumulations above 10°C, both first occurrence and peak flights of male adults occurred earlier than elsewhere in North America. Because potatoes in P.E.I. are attacked earlier and over a longer period of time than potatoes grown in other regions, the insect is an important pest of potatoes in P.E.I. The correlation between peak numbers of male adults caught in pheromone traps and egg masses on potato plants was not significant (p = 0.22). However, the correlation between egg masses per potato stalk and larvae per potato stalk was significant (p = 0.003). Trapping adults and monitoring potato plants for the presence of egg masses during the period from 250 to 500 degree-days appears to be a reliable way to determine the presence of adults and the potential impact of larvae on yield of potatoes.

EVIDENCE OF A MALE SEX PHEROMONE IN THE EUROPEAN CORN BORER, OSTRINIA NUBILALIS (HÜBNER) (LEPIDOPTERA: PYRALIDAE)

1992 ◽  
Vol 124 (1) ◽  
pp. 113-116 ◽  
Author(s):  
Lucie Royer ◽  
Jeremy N. McNeil
Keyword(s):  
Sex Pheromone ◽  
Mating System ◽  
Mating Success ◽  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Male Pheromone ◽  
Corn Borer ◽  
Male Sex Pheromone ◽  
Lepidoptera Pyralidae ◽  
Male Sex

AbstractEuropean corn borer males have hair pencils located ventrally on the 8th sternite and these are extruded when a male approaches a calling female. The fact that (i) antennectomized females mated significantly less than both intact controls and individuals subjected to other forms of surgery, and (ii) males with hair pencils removed had a significantly lower mating success than control males, suggests that a male pheromone is involved in the mating system of the European corn borer.

scholarly journals Isolation and characterization of Bacillus thuringiensis strains active against Elasmopalpus lignosellus (Zeller, 1848) (Lepidoptera, Pyralidae)

2017 ◽  
Vol 39 (4) ◽  
pp. 417
Author(s):  
Janaina Zorzetti ◽  
Ana Paula Scaramal Ricietto ◽  
Fernanda Aparecida Pires Fazion ◽  
Ana Maria Meneguim ◽  
Pedro Manuel Oliveira Janeiro Neves ◽  
...  
Keyword(s):  
Bacillus Thuringiensis ◽  
Isolation And Characterization ◽  
Elasmopalpus Lignosellus ◽  
Lepidoptera Pyralidae
Sign in / Sign up

Export Citation Format

Share Document