| Field evaluation of SilTAC® on Asian Citrus Psyllid compared to Imidacloprid 35% SC and Acetamiprid 20% SP |
| Paper ID : 1042-3IICE (R2) |
| Authors: |
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Mohammad Javad Salehi *1, Alireza Zia2, Vahid Ataei3, Javid Abbasi4, Ahmad Sadri5, Mohammad Javad Bagheri6, Mehdi Khorsandnia7 1Technical and R & D department 2CEO at Basir Chimi Pars Co., Iran. 3Technical and R&D department of Basir Chimi Pars Co., Iran. 4Quarantine Officer, Agricultural Organization, Fars Province, Iran 5Technical Director, Darab Agricultural Department, Fars Province, Iran. 6Plant Protection Officer, Darab Agricultural Department, Fars Province, Iran. 7Director of Fasarood Agricultural Services Station, Fars Province, Iran. |
| Abstract: |
| The Asian citrus psyllid, Diaphorina citri, is one the major pests of citrus trees which feeds on plant juice and reduces quality and quantity of citrus trees and their fruits. Different insecticides are recommended for controlling this pest, however, most of them are no longer demonstrate sufficient efficacy. SilTAC® 90% EC, with immobilization effect on insects, is a pesticide free product and has a physical mode of action compared to conventional insecticides. In this study, efficacy of three application rates of SilTAC® against different stages of Asian citrus psyllid nymph was compared to imidacloprid 35% SC and acetamiprid 20% SP. Trial was conducted in a completely randomized design with six treatments and four replications including SilTAC® (concentrations of 0.3, 0.5 and 1 L per 1000 Lof water), imidacloprid (0.5 L per 1000 L of water) and acetamiprid (0.5 Kg per 1000 L of water). A treatment with water was considered as control. The study was done in an infested lime tree grove in Fasarood, Darab, Fars province, Iran in May, 2018. Nymphs were counted before spraying and 24, 48 and 72 h following the application. Samples were taken by cutting 10 cm of infested shoots and transferring to the plant protection office laboratory of Darab Agricultural Organization. The number of living nymphs were counted using a binocular. Data obtained from sampling were corrected by Henderson-Tilton formula. Mortality rate was compared using Duncan multi-ranged test by SAS software. Results showed that there were no significant differences among treatments after 24 h, however, significant differences were observed after 48 h. Results demonstrated that all three application rates of SilTAC® had more than 90% mortality on different stages of nymphs 24 and 48 h post application. Similarly, 24 h after initial spraying with SilTAC® at 0.5L per 1000 L of water and 48 h post spraying with SilTAC® at 0.3L per 1000 L of water resulted in 98.5% and 98.42% mortality, respectively. While all three application rates of SilTAC®along with imidacloprid gave considerable control of nymphs, Acetamiprid had low efficacy on nymphs 24 and 48 h after initial spraying with 67.26% and 30.09% mortality, respectively. Considering low population of pest, no further sampling was conducted 72 h after initial spraying however visual field evaluation was carried out. Based on treatment comparisons and considering health and environment issues, SilTAC® could be introduced to Plant Protection Organization for further registration process. |
| Keywords: |
| Citrus Psyllid, Nymph, Physical mode of action, Decreased population. |
| Status : Paper Accepted (Poster Presentation) |
