title: Comparative efficacy of different approaches to managingMeloidogyne incognitaon green bean.
abstract: A greenhouse study was conducted to compare the relative efficacy of different approaches to managingMeloidogyne incognitaon green bean. These approaches included chemical (fumigant, non-fumigant, seed dressing, and seed dip), biological (the egg-parasitic fungus,Paecilomyces lilacinusand the mycorrhizal fungusGlomussp.), physical (soil solarization), and cultural (chicken litter and urea) methods. Accordingly, nine different control materials and application methods plus nematode-infected and non-infected controls were compared. Two important parameters were considered: plant response (plant growth and root galling) and nematode reproduction (production of eggs and the reproduction factor Rf). The results showed that the use of chicken litter as an organic fertilizer severely affected the growth and survival of the plants. Therefore, this treatment was removed from the evaluation test. All of the other eight treatments were found to be effective against nematode reproduction, but with different levels of efficacy. The eight treatments decreased (38.9-99.8%) root galling, increased plant growth and suppressed nematode reproduction. Based on three important criteria, namely, gall index (GI), egg mass index (EMI), and nematode reproduction factor (RF), the tested materials and methods were categorized into three groups according to their relative control efficacy under the applied test conditions. The three groups were as follows: (1) the relatively high effective group (GI = 1.0-1.4, Rf = 0.07-0.01), which included the fumigant dazomet, the non-fumigant fenamiphos, soil solarization, and seed dip with fenamiphos; (2) the relatively moderate effective group (GI = 3.4-4.0, Rf = 0.24-0.60), which included seed dressing with fenamiphos and urea; and (3) the relatively less effective group (GI = 5.0, Rf = 32.2-37.2), which includedP. lilacinusandGlomussp.
authors.affiliation: Plant Protection Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.
authors.forename: Ahmad S
authors.initials: AS
authors.lastname: Al-Hazmi
authors.affiliation: Plant Protection Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.
authors.forename: Ahmed A M
authors.initials: AA
authors.lastname: Dawabah
authors.affiliation: Plant Protection Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.
authors.forename: Saleh N
authors.initials: SN
authors.lastname: Al-Nadhari
authors.affiliation: Plant Protection Department, College of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia.
authors.forename: Fahad A
authors.initials: FA
authors.lastname: Al-Yahya
keywords: Fenamiphos; Glomus sp.; Integrated control; Paecilomyces lilacinus; Phaseolus vulgaris; Root-knot nematode; Solarization; Urea