Abstract:
To control the development of onion fly and other soil-dwelling
phytophages during sowing, the soil insecticide Force 1.5 G (tefluthrin, 15.0
g/kg) should be applied at a rate of 10.0 kg/ha. To control thrips and onion
hoverfly during the growing season, when their populations exceed
economic threshold levels, the insecticide Connect® 112.5 SC
(imidacloprid 100.0 g/L + beta-cyfluthrin 12.5 g/L) should be used at a rate
of 0.5 L/ha. In case of repeated mass pest occurrence, the product may be
applied twice during the growing season.
For the prevention of downy mildew and other diseases, and at the
appearance of first symptoms, the contact fungicide Antracol® 70 WG
(propineb 700.0 g/kg) should be applied at a rate of 2.0 kg/ha. If necessary,
the product may be used twice with a 7–10-day interval. To control downy
mildew and other fungal pathogens during vegetation (BBCH 20–29), the fungicide Shirlan 500 SC (fluazinam 500.0 g/L) may be applied at a rate of
0.8 L/ha. For effective control of downy mildew, neck rot, and rust, crops
should be treated with the systemic fungicide RIDOMIL® GOLD R 162 WG
(metalaxyl-M 20.0 g/L + copper oxychloride 142.0 g/L) at a rate of 5.0
kg/ha, applied twice.
To protect crops from broadleaf weeds, at the BBCH 12–14 stage it is
necessary to apply the systemic herbicide Challenge® (aclonifen 600.0
g/L) at a rate of 0.5 L/ha. To control grass weeds in onion agrocenoses, the
herbicide Agil EC (propaquizafop 100.0 g/L) should be applied at the BBCH
14–16 stage at a rate of 0.8 L/ha. If new flushes of broadleaf weeds
appear, repeated application of Challenge® (aclonifen 600.0 g/L) at a rate
of 0.5 L/ha is possible.
