Economic Injury Level of the Psyllid, Agonoscena pistaciae, on Pistachio, Pistacia vera cv. Ohadi
نویسندگان
چکیده
The pistachio psylla, Agonoscena pistaciae Burckhardt and Lauterer (Hemiptera: Psyllidae) is a major pest of pistachio trees, Pistacia vera L. (Sapindalis: Anacardiaceae) throughout pistachio-producing regions in Iran. Different density levels of A. pistaciae nymphs were maintained on pistachio trees by different insecticide dosages to evaluate the relationship between nymph density and yield loss (weight of 1000 nuts). Psylla nymph densities were monitored weekly by counting nymphs on pistachio terminal leaflets. There was a significant reduction in weight of 1000 nuts as seasonal averages of nymphs increased. Regression analysis was used to determine the relationship between nymph density and weight of 1000 nuts. The economic injury levels varied as a function of market values, management costs, insecticide efficiency and yield loss rate and ranged from 7.7 to 30.7 nymphal days per terminal leaflet, based on weight of 1000 nuts.
منابع مشابه
Spatial mapping of the common pistachio psylla, Agonoscena pistaciae: A case study in the Rafsanjan region, Iran
The common pistachio psylla Agonoscena pistaciae is a key pest of pistachio in Iran. A study was conducted to determine the spatial distribution of psylla nymphs and eggs in a 10 ha pistachio orchard in the Rafsanjan region, southeast of Iran. Three rows, each containing 33 trees (totally 99 trees), were randomly selected in the orchard based on a stratified sampling scheme. In each of the sele...
متن کاملToxicological and Biochemical Characterizations of AChE in Phosalone-Susceptible and Resistant Populations of the Common Pistachio Psyllid, Agonoscena pistaciae
The toxicological and biochemical characteristics of acetylcholinesterases (AChE) in nine populations of the common pistachio psyllid, Agonoscena pistaciae Burckhardt and Lauterer (Hemiptera: Psyllidae), were investigated in Kerman Province, Iran. Nine A. pistaciae populations were collected from pistachio orchards, Pistacia vera L. (Sapindales: Anacardiaceae), located in Rafsanjan, Anar, Bam, ...
متن کاملEvaluation of Three Neonicotinoid Insecticides Against the Common Pistachio Psylla, Agonoscena pistaciae, and Its Natural Enemies
The common pistachio psylla, Agonoscena pistaciae Burckhardt and Lauterer (Hemiptera: Psyllidae), is a key pest in pistachio orchards in Iran. Chemical control is a common method to manage this pest. Compatibility between natural enemies and pesticides is a primary concern in programs of integrated pest management of the psyllid pest. In this research, susceptibility of fifth instar nymphs of A...
متن کاملThe Effect of Liquid Detergent on Common Pistachio Psylla, Agonoscena Pistaciae, Soil and Plant
The common pistachio psylla, Agonoscena pistaciae (Homoptera: Psyllidae) is known as the key pest of pistachio trees in Iran. This study was carried out during three years to test the effect of dish washing detergent (Rika ® ) against this pest in a randomized complete block design with five treatments and four replicates. The treatments were including: 13500ml dish washing detergent per 1000 l...
متن کاملThe Toxicity Investigation of the Botanical Insecticides on the Common Pistachio Psyllid, Agonoscena pistaciae Burckhardt and Lauterer (Hemiptera: Psyllidae)
The common pistachio psyllid, Agonoscena pistaciae, is the key pest of pistachio trees in Iran. Both nymphs and adults suck sap from leaves and reduce plant vigor and yield, increase the number of blank, half growth kernel and unsplit nuts and also cause defoliation and buds drop. Detrimental effects of chemical synthetic insecticides and the resistance of common psyllid pistachio to them and t...
متن کامل