Thermal requirements and population dynamics of root‐knot nematodes on cucumber and yield losses under protected cultivation

• Published in: Plant pathology Vol. 63; no. 6; pp. 1446 - 1453
• Main Authors: Giné, A, López‐Gómez, M, Vela, M. D, Ornat, C, Talavera, M, Verdejo‐Lucas, S, Sorribas, F. J
• Format: Journal Article Publication
• Language: English
• Published: Oxford Blackwell Scientific Publications, etc 01.12.2014; Blackwell; Wiley Subscription Services, Inc
• Subjects: Agricultura; Agronomy. Soil science and plant productions; ARENARIA; Biological and medical sciences; biomass; chlorophyll; Control; crop yield; cucumbers; Cucumis sativus; DAMAGE; egg production; Enginyeria agroalimentària; equilibrium density; Fitopatologia; Fundamental and applied biological sciences. Psychology; greenhouse experimentation; inoculum; juveniles; leaves; LIFE-CYCLE; Meloidogyne javanica; Meloidogyne spp; MELOIDOGYNE-INCOGNITA; multiplication rate; Nematoda; Nematodes fitoparàsits; ORIENTAL MELON; Phytopathology. Animal pests. Plant and forest protection; PLANT-PARASITIC NEMATODES; planting; plastics; population dynamics; protected cultivation; Protozoa. Invertebrates; Root-knot nematodes; soil; SOIL-TEMPERATURE; thermal requirements; tolerance limit; TOMATO; VEGETABLES; WATERMELON; Àrees temàtiques de la UPC; Multiplication; Plant pathology; Vegetables; tolerance limit; Environmental factor; Protected cultivation; Fruit vegetable; Density; equilibrium density; Pest; Dicotyledones; Angiospermae; thermal requirements; Nematoda; Meloidogyne spp; Thermal factor; Meloidogyne; Cucurbitaceae; Loss; Tolerance; Cucumis sativus; Requirement; multiplication rate; Vegetable crop; Helmintha; Nemathelminthia; Spermatophyta; Population dynamics; Yield; Invertebrata; Cucumber
• ISSN: 0032-0862; 1365-3059
• DOI: 10.1111/ppa.12217

Several studies were carried out to determine (i) thermal requirements for development, egg production and emergence of juveniles, and completion of the life cycle of Meloidogyne incognita and Meloidogyne javanica on cucumber, (ii) the maximum multiplication rate and the equilibrium density of root‐knot nematodes on cucumber and yield losses in pot and plastic greenhouse experiments, and (iii) the relationships between relative leaf chlorophyll content (RLCC) and relative cucumber dry top weight biomass (RDTWB) in relation to increasing nematode densities at planting (Pᵢ) in pot experiments. Thermal requirements of M. incognita and M. javanica on cucumber did not differ, irrespective of the biological stage. In the pot experiments, M. javanica completed one generation. The maximum multiplication rate (a) was 833, and the equilibrium density (E) varied according to the effective inoculum densities. The relationship between RDTWB and Pᵢ fitted the Seinhorst damage function model. The RLCC value at 40 or 50 days post‐inoculation also fitted the damage model and was related to RDTWB. In greenhouse experiments, conducted from 2009 to 2012, M. incognita completed three generations. The values for a and E were 1147 and 625 second stage juveniles (J2) per 250 cm³ soil, respectively. The tolerance limit was below zero, and the minimum relative yield ranged from 0·12 to 0·34.