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Laimus had been 76, 21, 87, and 81 , respectively in Trial I; and were 54, 51, 48, and 78 , respectively in Trial II. Confirmation on the feeding on Meloidogyne spp. and R. reniformis by Neoactinolaimus using multiplex PCR analysis is in progress. Additional analysis is necessary on culture media that could help far more constant reproduction of Neoactinolaimus, and an in vivo assay on suppression of Meloidogyne spp. and R. reniformis by Neoactinolaimus. MANIPULATING SOIL Food WEBS Within a FLORIDA ORGANIC CITRUS ORCHARD TO Enhance BIOCONTROL BY ENTOMOPATHOGENIC NEMATODES. Campos-Herrera, Raquel1,two, F. E. El-Borai1,3, L. W. Duncan1. 1 Citrus Investigation and Education Center, University of Florida, 700 MedChemExpress SGC0946 Experiment Station Rd, Lake Alfred FL 33850; 2 Instituto de Ciencias Agrarias, CSIC, Serrano 115 dpdo Madrid, 28006, Spain; and 3Plant Protection Division, Faculty of Agriculture, Zagazig University, Egypt. An emerging organic citrus market in Florida could advantage considerably from productive, nonconventional methods to mitigate losses from pests and illnesses. We’re investigating the effects of OMRI (Organic Components Critique Institute) approved cultural practices on soil food webs as a way to create solutions to conserve and improve biological handle of insect pests by indigenous entomopathogenic nematodes. An experiment was established in a commercial, organic citrus orchard on Florida’s central ridge. The treatments consisted of 3 amendments: i) a mulch of commercially pelleted chicken manure, ii) a industrial formulation of Paecilomyces lilacinus applied twice, iii) sulfur applied twice to lessen soil pH, and iv) an unamended manage. The experimental style was total randomized block with 10 replications, each and every comprising 3 adjacent trees. Soil samples had been taken pre-application and 1, 3 and six months post-treatment initiation (T0-T6). Response variables integrated adult root weevils (D. abbreviatus) emerging from soil, soil pH and moisture, citrus fibrous roots dry weight, free-living (FLN) and plant-parasitic nematodes (PPN), and measurement by real-time PCR of six entomopathogenic nematode (EPN) species, 5 species of nematophagous fungi (NF), two Paenibacillus bacterial species which can be phoretic on EPNs and Acrobeloides-group nematodes that can compete with EPNs. The only EPNs detected were Steinernema diaprepesi,456 Journal of Nematology, Volume 44, No. four, December 2012 Heterorhabditis indica and H. zealandica. Seasonal boost in numbers of H. zealandica (P 0.001) and Acrobeloidesgroup (P 0.001) have been not impacted by remedies. All therapies decreased H. indica and Hirsutella rhossiliensis when compared with controls at T1 (P = 0.040, and 0.019, respectively). Numbers of Paenibacillus sp. had been straight associated to both these of S. diaprepesi (P = 0.026) and Acrobeloides-group nematodes (P 0.001). Similarly, Paenibacillus nematophilus was directly related to H. indica (P = 0.001). At T3 FLNs have been much more a lot of in plots mulched with manure (P = 0.014). The NF Paecilomyces lilacinus elevated in plots exactly where it was augmented (T1 P = 0.053; T3 P 0.001; T6 P = 0.021), reaching a maximum level at T3 that was 17.5-fold higher than that in controls. In the identical time (T3), two indigenous NF, Arthrobotrys dactyloides and Monacrosporium gephyropagum, tended to boost (P = 0.051 and P = 0.078, respectively) in P. lilacinusamended plots, as did the DNA recovered from nematode samples and citrus fibrous root weights (P = 0.003 and P = 0.022). On the other hand, elevate.