Drenching Efficacy of Imidacloprid and Thiamethoxam against Dubas Bug, Ommatissus lybicus (Hem: Tropiduchidae) | ||||
Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control | ||||
Article 6, Volume 6, Issue 1, December 2014, Page 43-52 PDF (277.15 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/eajbsf.2014.17258 | ||||
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Authors | ||||
R. Arbabtafti1; A. Sheikhigarjan1; A. Hosseini Gharalari1; R. Damghani2; M. R. Tajbakhsh3; K. M. Arab Jafari4 | ||||
1Department of Agricultural Entomology Research, Iranian Research Institute of Plant Protection, Yaman Avenue, Chamran Highway, Tehran, Iran | ||||
2Bam Agricultural Research Center, Research Center of Agriculture and Natural Resource, Kerman Province, Iran. | ||||
3Department of Pesticide Research, Iranian Research Institute of Plant Protection, Yaman Avenue, Chamran Highway, Tehran, Iran | ||||
4Karaj Plant Protection Laboratory, Iranian Research Institute of Plant Protection, Yaman Avenue, Chamran Highway, Tehran, Iran | ||||
Abstract | ||||
Dubas bug, Ommatissus lybicus, is one of the key pests of date palmsin Iran. Chemical control is the most conventional control method of this dangerous pest. The aim of this investigation was to compare efficacy, advantages and disadvantages of drenching, and foliage spraying of chemical control. The study was conducted in a Randomized Complete Block Design with 10 treatments and 3 replications (trees) in a completely infested date palm grove. Treatments included imidacloprid SC350 (Confidor®) and thiamethoxam WG250 (Actara®) by foliar spraying (4 g/tree) and by drenching method (10, 20, 80, and 100 g/tree), diazinon EC600 (40 ml/tree) as recommended insecticide by foliar spraying and then the check (without treatment). The nymph population and number of honeydew drops were recorded one day before and 7, 14, and 120 days after treatment. Insecticide residue of date palm and cost-benefit ratio were calculated. The results showed that all foliage application treatments had more efficacy compared to drenching treatments at 1 and 2 weeks after spraying but at 120 days after drenching, thiamethoxam (80 g/L) and imidacloprid (100 g/L) had 100% efficacy, while the efficacies of thiamethoxam, imidacloprid, and diazinon foliar spraying was zero. The residue of date fruit treated by high doses of drenching was not detectable. The highest cost-benefit ratio belongs to imidacloprid foliage spraying (24.86) followed by imidacloprid drenching (15.67). The lowest ratio belongs to thiamethoxam drenching (3.12). Comparison of different concentrations of neonicotinoid drenching revealed that high concentration of thiamethoxam and imidacloprid was more than two times effective. | ||||
Keywords | ||||
Dubas bug; Drenching; Imidacloprid; thiamethoxam | ||||
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