Submit a PCR

Prnum Pesticide(MFG) Commodity (Crop Group) Category (Code) EPA Status 13513 B SILVER CHRYSAL AVOCADO (24B = TROPICAL AND SUBTROPICAL, MEDIUM TO LARGE FRUIT, SMOOTH, INEDIBLE PEEL SUBGROUP) EPA HOLD (12) Reasons for need: THE FUNGUS RAFFAELEA LAURICOLA CAUSAL AGENT OF THE LAUREL WILT DISEASE ON AVOCADOS; PROPICONAZOLE INJECTED IS GIVING SOME CONTROL BUT SINCE THE FORMULATION IS AN EMULSION THE MOVEMENT IN THE AVOCADO TREE IS LIMITED AND COMPARTMENTALIZED AND IN MANY INSTANCES IT DOES NOT WORK. SILVER IS WATER SOLUBLE OR DISPERSED; THE PARTICLE SIZE IS VERY SMALL AND PENETRATION AND DISTRIBUTION IS VERY GOOD; IN ADDITION, NOT ONLY HAS FUNGICIDAL PROPERTIES BUT ALSO AFFECTS TYLOSE FORMATION THAT CLOGS THE VASCULAR SYSTEM. SILVER INHIBITS ETHYLENE ACTIVITY AN ETHYLENE TRIGGERS TYLOSE FORMATION Efficacy/Crop Safety (E/CS) Data Required: E/CS Research Comments: Comments: ; EPA HOLD: 08/23, 08/24 Field Res.Dir (FRD) Field ID# Field Data Track# Raw Data Data to MFG Performance Results & Comments Monterroso, V. Armando 22-FL-DMP RECD 5257.pdf 08/22 TWO CHRYSAL AVB INJECTIONS AT 1 CC AND 5 CC PER PLANT REDUCED LAUREL WILT SEVERITY IN AVOCADO PLANTS COMPARED TO UTR. SIMILAR TO INJECTIONS OF TILT (PROPICONAZOLE) + 0.16 G OF POTASSIUM PERMANGANATE. NO DIFFERENCE IN SYMPTOMS WAS OBSERVED BETWEEN 1 CC AND 5 CC. SOME PHYTOTOXICITY AROUND THE INJECTION POINT WAS OBSERVED ON PLANTS TREATED WITH OF TILT (PROPICONAZOLE) + 0.16 G OF POTASSIUM PERMANGANATE.