18. Herbicide guide for deciduous orchards in WA Definitions Knockdown herbicides control established weeds only. They may be contact, only burn off those parts of the plant contacted or systemic, absorbed and translocated throughout the plant for a total kill. Pre-emergent or residual herbicides control germinating weed seeds before they emerge, but some can be effective up to the two-leaf stage. Control relies on a barrier of chemical in the surface of the soil. Key: Knockdown herbicide = Residual herbicide = Reference: Infopest Online Weeds controlled Active ingredient Chemical Common trade Crop Comments class names annual and 2,2 DPA J Altapon 2,2 Pome fruit, Knockdown, systemic herbicide. –DPA perennial grasses summer fruit DO NOT apply to trees under 4 years old. Dalapon 740 SP Best results with half rate at 4−6 week interval. broad-leaf weeds, amitrole + Q Various Pome fruit, Knockdown, systemic herbicide, absorbed grasses and couch ammonium summer fruit mainly through leaves. Do not apply less thiocyanate than 56 days before harvest. annual broad-leaf amitrole + paraquat LQ Alliance Pome fruit, Can be combined with residual herbicides for and grasses summer fruit longer term control. dichloride dock asulam K Various Apples Narrow-spectrum knockdown herbicide. various broad-leaf carfentrazone-ethyl G Various Summer fruit Can be used for desuckering or combined weed species with a knockdown herbicide. Refer to label. grass weeds only clethodim A Various Non-bearing fruit trees
18. Herbicide guide for deciduous orchards in WA Definitions Knockdown herbicides control established weeds only. They may be contact, only burn off those parts of the plant contacted or systemic, absorbed and translocated throughout the plant for a total kill. Pre-emergent or residual herbicides control germinating weed seeds before they emerge, but some can be effective up to the two-leaf stage. Control relies on a barrier of chemical in the surface of the soil. Key: Knockdown herbicide = Residual herbicide = Reference: Infopest Online Weeds controlled Active ingredient Chemical class Common trade names Crop Comments annual and perennial grasses 2,2 DPA J Altapon 2,2 –DPA Dalapon 740 SP Pome fruit, summer fruit Knockdown, systemic herbicide. DO NOT apply to trees under 4 years old. Best results with half rate at 4−6 week interval. broad-leaf weeds, grasses and couch amitrole + ammonium thiocyanate Q Various Pome fruit, summer fruit Knockdown, systemic herbicide, absorbed mainly through leaves. Do not apply less than 56 days before harvest. annual broad-leaf and grasses amitrole + paraquat dichloride LQ Alliance Pome fruit, summer fruit Can be combined with residual herbicides for longer term control. dock asulam K Various Apples Narrow-spectrum knockdown herbicide. various broad-leaf weed species carfentrazone-ethyl G Various Summer fruit Can be used for desuckering or combined with a knockdown herbicide. Refer to label. grass weeds only clethodim A Various Non-bearing fruit trees
Pome%20%26%20Summer%20Fruit%20Orchard%20%20Spray%20Guide%202014-15_0.docx