Comparison of the several biological, hormonal and chemical insecticides on Diamond Back Moth (DBM)

Subject Areas : entomology and othea arthropods

R. Nasiri ¹ (Graduated student, Department of Entomology, Khorasgan (Isfahan) Branch, Islamic Azad University, Khorasgan, Iran)
J. Karimzadeh ² (Department of Plant Protection, Isfahan Research Center for Agriculture and Natural Resources, Isfahan, Iran)
A. R. Jalalizand ³ (Department of Entomology, Khorasgan (Isfahan) Branch, Islamic Azad University, Khorasgan, Iran)

Received: 2013-08-06 Accepted : 2013-10-30 Published : 2015-05-22

Keywords:

Abstract :

The diamondback moth is one of the most destructive insect pests of cruciferous crops in worldwide especially in Iran that has shown major outbreak in cabbage and cauliflower fields in province Isfahan during recent years. This study aimed to investigate the performance of three bio-pesticides containing two commercial Bacillus turingiensisssp. kurstaki (Belthirul, Lepinox­Plus) and one entomophagous fungus Beauveria bassiana (Naturalis), a hormonal insecticide (Atabron) and a chemical insecticide (Sumipleo) against this pest in the field. The experiment was conducted in 5 treatments in 4 replications in a randomized complete block sketch. Area of each plot was assigned about 50 square meters and the number of live larvae of the pest was counted on 10 plants in each plot on one day before and 5 and 10 days after spraying. The difference in mortality percentage between treatments was modified by Henderson-Tilton formula and analyzed by one-way Analysis of Variance (ANOVA) The results showed significant differences between treatments for the mean mortality percentage on DBM larvae at 5 and 10 days after spraying. The highest and lowest mean mortality was seen in Sumi­pleo with 88.2% and 87.8% and Naturalis with 35.3% and 36.5% in 5 and 10 days after spraying, respectively. Also, results of Logistic analysis of deviance showed significant differences between treatments for the mean mortality percentage on DBM larvae at 5 and 10 days after spraying. Therefore Sumi­pleo had the highest performance in both 5 and 10 days after spraying with 88.3% and 88.6% mortality, respectively, and then Atabron (77%, 62.7%), Belthirul (67.8%, 71.9%), Lepinox­Plus (71%, ­72.4%) and finally Naturalis (37.9%, 43.7%) with lowest performance. Due to good performance and compatibility with natural enemies, lower hazard than chemical pesticide and the result of this study the biological pesticide Lepinox Plus and Belthirul are recommended against DBM.