Abundance of Nontarget Foliage-Dwelling Insects After Insecticide Treatment for Adult European Corn Borer (Lepidoptera: Pyralidae)1

1988 ◽  
Vol 81 (5) ◽  
pp. 1323-1327 ◽  
Author(s):  
Fred Whitford ◽  
William B. Showers
Keyword(s):  
European Corn Borer ◽  
Insecticide Treatment ◽  
Corn Borer ◽  
Lepidoptera Pyralidae

Natural Parasitism and Release Efficiency of Trichogramma evanescens Westwood in Ostrinia nubilalis Hübner Attacking Maize in Turkey

2009 ◽  
Vol 44 (2) ◽  
pp. 132-140 ◽  
Author(s):  
Sevcan Oztemiz
Keyword(s):  
Ostrinia Nubilalis ◽  
European Corn Borer ◽  
Grain Weight ◽  
Control Treatment ◽  
Trichogramma Evanescens ◽  
Insecticide Treatment ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
1000 Grain Weight ◽  
Natural Parasitism

The natural parasitism rate and the release efficiency of the egg parasitoid, Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae), in the biological control of the European corn borer, Ostrinia nubilalis Hübner (Lepidoptera: Pyralidae), was determined in field plots of maize in the Eastern Mediterranean, Turkey. Parasitoids were released in maize plots as parasitized eggs of laboratory-reared Ephestia kuehniella Zeller (Lepidoptera: Pyralidae). The parasitized eggs (n = 150,000) were released twice in a 10-d interval at the beginning of the oviposition period of the third generation of O. nubilalis in the second crop of maize in released treatment (without insecticides). Other treatments were an untreated control (without wasps and without insecticides) and an insecticide treatment (Lambda-Cyhalothrin, 50 g I−1 300 ml ha−1; without wasps). Ostrinia nubilalis egg masses, larvae and plant damage were regularly assessed until crop harvest. Parasitization of egg masses by T. evanescens was determined in each sample. The mean (± SD) percentage of parasitized O. nubilalis eggs was 86.2 ±l11.6 (± SD)%. Compared with the control treatment, the number of plants damaged by European corn borer larvae in the release treatment was reduced by 96%, whereas the number of larvae was reduced by 95.2%. Average grain yield was 8,800 ± 15.2 kg ha−1 (380.0 ± 1.6 g per 1000 grain weight) in the Trichogramma release treatment without insecticide, 7,000 ± 28.8 kg ha−1 (314.8 ± 2.9 g per 1000 grain weight) in the control treatment, and 8,533 ± 8.8 kg ha−1 (360.4 ± 8.5 g per 1000 grain weight) in the insecticide treatment. The grain yield and 1000 grain weight differences differed significantly (P ≤ 0.01) between the untreated control and the other two treatments (released treatment and insecticide treatment). Natural parasitization of O. nubilalis eggs by T. evanescens as observed in control and insecticide-treated plots was 30.2%. These results indicate that biological control of O. nubilalis with T. evanescens should be developed as an integral control method in integrated management programs for maize grown in Turkey.

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.

Scambus pterophori (Ashm.) (Hymenoptera: Ichneumonidae), a New Parasite of the European Corn Borer, Pyrausta nubilalis (Hbn.) (Lepidoptera: Pyralidae), in Canada

1959 ◽  
Vol 91 (2) ◽  
pp. 128-128
Author(s):  
Marcel Hudon
Keyword(s):  
European Corn Borer ◽  
Second Generation ◽  
Petri Dish ◽  
First Record ◽  
Corn Borer ◽  
Lepidoptera Pyralidae ◽  
Pyrausta Nubilalis ◽  
Experimental Plots

In late August, 1957, a parasitized second-generation pupa of Pyrausta nubilalis (Hbn.) was observed in silks of an immature corn ear in the experimental plots at St. Jean. The pupa was incubated at 75°F. in a petri dish, and two weeks later an ichneumonid parasite emerged and was identified by Mr. G. S. Walley, Entomology Division, Ottawa, as Scambus pterophori (Ashm.). Asecond generation of P. nubilalis is very unusual in the St. Jean area. This is apparently the first record of this ichneumonid as a parasite of P. nubilalis in Canada.

European Corn Borer (Lepidoptera: Pyralidae) Development Time Model

1996 ◽  
Vol 25 (2) ◽  
pp. 310-320 ◽  
Author(s):  
B. Got ◽  
J. M. Labatte ◽  
S. Piry
Keyword(s):  
European Corn Borer ◽  
Development Time ◽  
Time Model ◽  
Corn Borer ◽  
Lepidoptera Pyralidae

Reduction of European Corn Borer (Lepidoptera: Pyralidae) Damage by Intercropping Corn with Soybean

1989 ◽  
Vol 82 (5) ◽  
pp. 1455-1459 ◽  
Author(s):  
Ralph C. Martin ◽  
Thor J. Arnason ◽  
John D. H. Lambert ◽  
Pierre Isabelle ◽  
Harvey D. Voldeng ◽  
...  
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
Lepidoptera Pyralidae

Effects of Precipitation and Wind on Populations of Adult European Corn Borer (Lepidoptera: Pyralidae)1

1983 ◽  
Vol 12 (4) ◽  
pp. 1193-1196 ◽  
Author(s):  
Thomas W. Sappington ◽  
William B. Showers
Keyword(s):  
European Corn Borer ◽  
Corn Borer ◽  
Lepidoptera Pyralidae
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