Seed applied bioprotectants for control of seedborne Alternaria arborescens and growth enhancement of wheat

PERELLÓ, A.; LAMPUGNANI, G.; ABRAMOFF, C.; FUSÉ C. B.; DAL BELLO G. M.

Zagreb

Conferencia; 10th Conference on Integrated Protection of Stored Products IPSP 2015 IOBC/wprs; 2015

Abstract The Alternaria genus is among the major fungal components of wheat grain under postharvest and storage conditions where A. arborescens was recently detected as a new member of this complex in Argentina causing black point. The aim of this study was to assess the potential of some biorational agents to control A. arborescens and their effect on the plant growth promotion of wheat. Seed treatments with Trichoderma harzianum and Eppicocum nigrum; Lippia alba and garlic extracts; sodium bicarbonate (SB), salicylic acid (SA), potassium chloride (PC) and dibasic sodium phosphate (SP) were applied to grains of wheat cultivar BIOINTA 1004 previously to the infection with the pathogen. The grains thus treated were placed in plastic trays following ISTA (blotter method) rules. After 7 days, seed germination, infected seeds, necrotic symptoms of emerged seedlings and fresh weight were evaluated. Remarkable results were obtained with L. alba, SA and SP that reduced symptoms from 50 to 78% compared with the control. Interestingly, necrosis of radicles was significantly reduced by the application of all treatments tested. Moreover, fresh weight of seedlings was significantly increased with the application of the two antagonists, garlic and the three tested salts in comparison with control. Therefore, a positive role as growth promoters can be elucidated. It is concluded that compounds here tested have potential as biofertilizers and ecofriendly alternatives to control seed-borne fungi of wheat.