Abstract
Tomato growers commonly face heavy nematode (Meloidogyne incognita) and whitefly (B-biotype Bemisia tabaci) infestations, and previous studies demonstrated that thiacloprid could be used to control M. incognita and B. tabaci in cucumber. However, the efficacy of a single basal application of thiacloprid to control both pests and its effect on yield in tomato remains unknown. In this study, the potential of thiacloprid application to the soil for the integrated control of M. incognita and B. tabaci in tomato was evaluated in the laboratory and the field. Laboratory tests showed that thiacloprid was highly toxic to whitefly adults and eggs with an average lethal concentration 50 (LC50) of 14.7 and 62.2 mg ai L−1, respectively, and the LC50 of thiacloprid for nematode J2s and eggs averaged 36.2 and 70.4 mg ai L−1, respectively. In field trials, when thiacloprid was applied to the soil at 7.5, 15 and 30 kg ha−1 in two consecutive years, whitefly adults decreased by 37.8–75.4% within 60 days of treatment, and the root-galling index was reduced by 31.8–85.2%. Optimum tomato plant growth and maximum yields were observed in the 15 kg ha−1 treatment. The results indicated that a single basal application of thiacloprid could control M. incognita and B. tabaci and enhance tomato growth and yield.
Highlights
Chemicals Bemisia tabaci B biotype Adult Thiacloprid Imidacloprid Eggs Thiacloprid Imidacloprid Meloidogyne incognita J2 Thiacloprid Abamectin Eggs Thiacloprid Abamectin
The aims of the present study were to perform: (a) laboratory tests to determine the efficacy of thiacloprid in the control M. incognita and B-biotype B. tabaci and (b) field trials to evaluate its effects on M. incognita and B-biotype B. tabaci control and tomato crop productivity with a single basal soil application
The whitefly population was significantly reduced by different doses of thiacloprid in both years, 54.2–90.9% for 1 and 10 days after treatment for all doses
Summary
Chemicals Bemisia tabaci B biotype Adult Thiacloprid Imidacloprid Eggs Thiacloprid Imidacloprid Meloidogyne incognita J2 Thiacloprid Abamectin Eggs Thiacloprid Abamectin. Previous studies demonstrated that thiacloprid could be used in cucumber for the integrated control of M. incognita and B. tabaci[12], so thiacloprid may be applied to the soil to control nematodes in tomato, and be absorbed by the roots and transferred to the shoots to control whiteflies. The aims of the present study were to perform: (a) laboratory tests to determine the efficacy of thiacloprid in the control M. incognita and B-biotype B. tabaci and (b) field trials to evaluate its effects on M. incognita and B-biotype B. tabaci control and tomato crop productivity with a single basal soil application
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