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Systemic acquired resistance activation in solanaceous crops as a management strategy against root‐knot nematodes
Author(s) -
Molinari Sergio
Publication year - 2016
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.4063
Subject(s) - meloidogyne incognita , salicylic acid , nematode , biology , systemic acquired resistance , root knot nematode , hatching , dose , agronomy , horticulture , zoology , biochemistry , ecology , arabidopsis , mutant , gene , pharmacology
BACKGROUND Activators of systemic acquired resistance ( SAR ), such as salicylic acid ( SA ) and its synthetic functional analogues benzo(1,2,3)thiadiazole‐7‐carbothionic acid‐ S ‐methyl ester ( BTH ) and 2,6‐dichloroisonicotinic acid ( INA ), were tested on tomato, eggplant and pepper for the control of the root‐knot nematode Meloidogyne incognita . Effects on plant fitness, nematode reproduction and root galling were screened in relation to different methods of application, to different applied dosages of chemicals and to different plant growth stages. Dosages applied to plants were in relation to plant weights. These chemicals were also tested for their possible nematotoxic activity in vitro.RESULTS Soil drenches of SA and INA and root dip application of SA and BTH inhibited nematode reproduction, at specific dosage ranges, without affecting plant growth. SA and INA were able to reduce root galling as well. Foliar sprays of both SA and BTH were ineffective against nematode attacks. Plants tolerated SA more than the other chemicals tested. BTH at elevated concentrations increased the mortality of nematode juveniles and reduced egg hatching in vitro.CONCLUSIONS SAR activators at concentrations suitable for different plant growth stages and applied by the proper method can possibly be included in IPM programmes for nematode management. © 2015 Society of Chemical Industry