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B emisia tabaci ( G ennadius) population density and pupal size are dependent on rootstock and nitrogen in hydroponic tomato crop
Author(s) -
Žanić Katja,
Dumičić Gvozden,
Urlić Branimir,
Vuletin Selak Gabriela,
Goreta Ban Smiljana
Publication year - 2017
Publication title -
agricultural and forest entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.755
H-Index - 55
eISSN - 1461-9563
pISSN - 1461-9555
DOI - 10.1111/afe.12179
Subject(s) - rootstock , biology , nymph , pest analysis , population density , horticulture , population , grafting , crop , nutrient , agronomy , botany , ecology , chemistry , demography , organic chemistry , sociology , polymer
B emisia tabaci is one of the most damaging pests in tomato greenhouse production. The resistance of B . tabaci to insecticides requires a new approach with respect to the integrated management of this pest. The effect of grafting (nongrafted and tomato grafted on the rootstock A rnold) and nitrogen ( N ) rates (75, 140 and 205 mg/ L ) on the density of B . tabaci large nymphs (fourth instar to pupae) was studied in 2012. In 2013, large nymphs density was examined in relation to grafting treatments (nongrafted, self‐grafted and tomatoes grafted onto the rootstocks A rnold and H e‐ M an) and NO 3 − : NH 4 + ratios (92 : 8, 85 : 15 and 70 : 30). A reduction of B . tabaci population density was found for rootstock A rnold grown at 140 and 205 mg/ L N in the nutrient solution. Pupal size decreased with decreasing N fertilization. In the second experiment, rootstocks contributed to a reduction of B . tabaci density at different NO 3 − : NH 4 + ratios. The lowest B . tabaci population density was found on plants grafted onto H e‐ M an rootstock supplied with an 85 : 15 and 70 : 30 NO 3 − : NH 4 + ratio in nutrient solutions. The increased proportion of NH 4 + in the 85 : 15 NO 3 − : NH 4 + ratio generally reduced the B . tabaci pupal size for all rootstocks. Grafting and N adjustment could represent useful tools for integrated greenhouse pest management.