Moyal Pascal, Fédière Gilles, Semeada A.M., El-Sheikh M.A.K., El-Sherif S., Abol-Ela S. (1997). Control of the pink borer, Sesamia cretica Led. (Lepidoptera : Noctuidae) in maize field using a granulosis virus in Egypt. In :
European meeting in the IOBC/WPRS working group "insect pathogens and insect parasites nematodes" special theme "microbial control of pests in sustainable agriculture". Le Caire : ORSTOM, 12 p. multigr. Insect Pathogens and Insect Parasites Nematodes : European Meeting in the IOBC/WPRS Working Group, 6., Copenhague (DNK), 1997/08/10-15.
Titre du document
Control of the pink borer, Sesamia cretica Led. (Lepidoptera : Noctuidae) in maize field using a granulosis virus in Egypt
Année de publication
1997
Type de document
Colloque
Auteurs
Moyal Pascal, Fédière Gilles, Semeada A.M., El-Sheikh M.A.K., El-Sherif S., Abol-Ela S.
In
European meeting in the IOBC/WPRS working group "insect pathogens and insect parasites nematodes" special theme "microbial control of pests in sustainable agriculture"
Source
Le Caire : ORSTOM, 1997,
12 p. multigr.
Colloque
Insect Pathogens and Insect Parasites Nematodes : European Meeting in the IOBC/WPRS Working Group, 6., Copenhague (DNK), 1997/08/10-15
The pink borer, Sesamia cretica Lederer (Lepidoptera : Noctuidae), is a main pest of maize in Egypt. Attacks by S. cretica are usually high on early plantations of April, when the first generation of adults emerge after a period of larval hibernation. The present study aimed to evaluate the feasibility of the granulosis virus of S. cretica, recently isolated by Fediere et al. (1993) as a microbiological agent. A field experiment was conducted in 1997 at Sakha Agricultural Research Station, Kafr El-Sheikh governorate, North of the Nile delta, where heavy natural infestation by S. cretica is of frequent occurrence on early plantations. The experimental design was randomized blocks with seven replications and five treatments. Treatments were control (T1), the currently recommended chemical insecticide (methomyl, 640 g active ingredient per hectare) (two sprayings, three and five weeks after sowing) (T2), and three treatments with highly purified suspensions of virus in water at three different doses (two sprayings, three and five weeks after sowing). The lowest dose of the virus insecticide (T3) was 60 g of granules per hectare (i.e. 7.4 x 10 to the 15th power I.B./ha). The other doses were double this dose (T4) and five times this dose (T5). Molasses was added to the virus suspension at a rate of 10% as a sticker and a feeding stimulant. Samples of 20 plants per plot were taken every week for four successive weeks from the day of the first treatment. Population density in the control was close to one borer per stem during the first three weeks and decreased to 0.2 borer per stem during the fourth week. Comparison between tested treatments using analysis of variance and Newman-Keuls test showed that the viral suspensions had an efficiency not different from that of methomyl, and that populations were significantly reduced in the sprayed plots in comparison with the control (about 70% reduction)... (D'après résumé d'auteur)
Plan de classement
Lutte biologique / Lutte intégrée [076RAVPLA08]
Descripteurs
INSECTE NUISIBLE ; LUTTE BIOLOGIQUE ; VIRUS ; PURIFICATION ; INFESTATION ; ETUDE EXPERIMENTALE
Description Géographique
EGYPTE
Localisation
Fonds IRD [F B010016041] ;
Montpellier (Centre IRD)
Identifiant IRD
fdi:010016041
