Chateau. Herbicide WDG. Horticulture Crops Technical Manual. Innovative solutions. Business made easy.

Transcription

1 Chateau Herbicide WDG Horticulture Crops Technical Manual Innovative solutions. Business made easy.

2 Aim: To provide long lasting pre-emergence residual control of many problematic broadleaf and grass weeds in various horticulture crop production systems.

3 Introduction: Chateau Herbicide works as a barrier along the soil surface to provide season-long residual control of tough broadleaf and grass weeds. This includes pigweed, lamb s-quarters, common ragweed, dandelion, eastern black nightshade, hairy nightshade and green foxtail. Chateau contains flumioxazin (51.1%), a powerful pre-emergence herbicide. A PPO inhibitor, Chateau s mode of action is different than many other commonly used herbicides; therefore, it helps fight resistance, while providing long-lasting control of tough weeds. Chateau Herbicide offers growers excellent residual control of many problematic weeds while being environmentally friendly, as it is not prone to leaching or volatilizing. Benefits of Using Chateau: Chateau Herbicide is a grower s new advantage in the fight against a broad spectrum of challenging to control weeds. Growers who apply a residual herbicide such as Chateau can stop weeds with long-lasting pre-emergence action. Growers can rely on Chateau as a tool to improve the quality of their crop and increase their profits. Chateau keeps weeds from germinating for months (rate dependant). It is activated after ¼ inch rainfall. Chateau stays where you put it: it will not leach or volatilize. Flexible application timing. Chateau belongs to the group 14 classification of herbicides, which allows growers the added benefit of managing weed resistance on their farm. Flumioxazin is active in very small amounts as long as the herbicide barrier is not disturbed, flumioxazin will provide residual weed control.

4 Mode of Action: Chateau contains flumioxazin 51.1 %. Flumioxazin inhibits the activity of protoporphyrinogin oxidase (PPO enzyme). Chateau s mode of action is different than many other commonly used herbicides. So it helps fight resistance, while providing long-lasting control of tough weeds. PPO inhibitors may also be referred to as cell membrane disruptors. Some PPO-inhibitors can be applied pre-emergence for weed control, as is the case with Chateau. When applying Chateau as a standalone herbicide, the application needs to be made to bare ground. A tankmix partner, such as glyphosate, is needed to control emerged weeds. After application, a small amount of rainfall or irrigation is required to activate the herbicide. Chateau will then form an invisible barrier along the soil surface. When germinating susceptible weeds come into contact with this barrier, they will be controlled. If the ground is disturbed (mechanical tilling etc) the Chateau barrier will be disrupted and weeds will emerge where the herbicide barrier was broken. Chateau offers residual control of several susceptible broadleaf and grass weeds. It also assists in the control of acetolactate synthase (ALS) resistant weeds. The length of residual control is dependent on the application rate as well as on rainfall and temperature conditions. Length of residual control will decrease as temperature and precipitation increase; and where soils contain high organic matter and/or high clay content. 4

5 Registered Crops: Pome Fruit (Apples and Pears) Stone Fruit (Cherry, Peach, Nectarine, Apricot, Plum) Grapes Blueberries (Highbush and Lowbush) Strawberries Potatoes Dry Bulb Onions Field Peppers Celery Asparagus Mint Weeds Controlled: (Suppression in potatoes) Redroot pigweed Green pigweed Common ragweed Common lamb s-quarters Green foxtail Hairy nightshade Dandelion Eastern black nightshade Moss (suppression in lowbush blueberry) 5

6 Application Information: Crop Pome Fruit (Apple & Pear) & Grape Rate * g/ha ( g/ac) Stone Fruit (Peach, Cherry, Nectarine, Apricot) * g/ha ( g/ac) Highbush Blueberry Lowbush Blueberry Strawberry Potato Dry Bulb Onion Field Pepper Celery Asparagus Mint (Peppermint and Spearmint) *280 g/ha for Course-textured soil type. 480 g/ha for Medium-textured soil type. *140 g/ha for Course-textured soil type. 210 g/ha for Medium-textured soil type. ***210 g/ha for Course-textured soil type. **105 g/ha for Course-textured soil type. * g/ha ( g/ac) * g/ha (57 85 g/ac) Moss: g/ha ( g/ac) ***210 g/ha (85 g/ac) **105 g/ha (42 g/ac) *140 g/ha (57 g/ac) * g/ha (57 85 g/ac) * g/ha (57 85 g/ac) Muck soils: 140 g/ha (57 g/ac) * g/ha ( g/ac) *280 g/ha (113 g/ac) Apply Chateau before targeted weeds emerge. Moisture (rain or irrigation) following application is needed to activate the active ingredient. For maximum weed control avoid disturbing the Chateau herbicide barrier. Do not mechanically incorporate after application. Onions, Untreated Plots Onions, Chateau Applied Plot (at 2 leaf)

7 Crop Specific Application Instructions: Pome Fruit, Stone Fruit and Grapes: Apply Chateau as a uniform broadcast spray or direct a band at the base of the trunk with a sufficient water volume. For best results make two sequential applications at least 30 days apart (fall and spring, after final harvest or before bud break for greatest crop safety). If weeds have emerged Chateau can be applied in tank mixture with a burndown product such as glyphosate. Chateau can be applied to pome and stone fruit trees established 1 year or more and to grapes established 2 years or more. PHI: 60 days. Re-entry interval: 12 hours. Chateau cannot be applied within 100 metres of non-dormant pears. Highbush Blueberries: Apply Chateau using a sufficient water volume. For best results make 2 sequential applications at least 30 days apart before bud break in the spring. If weeds have emerged Chateau can be applied in tank mixture with a burndown product such as glyphosate. Chateau can be applied to highbush blueberries established 2 years or more. Avoid spray contact with crop fruit and foliage. PHI: 7 days. Re-entry interval: 12 hours. Lowbush Blueberries: Apply Chateau with adequate water volume to ensure thorough coverage. For best results make 2 applications per season at least 30 days apart to dormant plants in the sprout year (spring and/or fall) or as a dormant post harvest (fall). Re-entry interval: 12 hours. Strawberries: For best results apply Chateau to dormant strawberry plant (do not apply to non-dormant plants) late in the fall/early winter prior to laying straw or early in the spring. If applying in the winter do not apply over top of snow. Re-entry interval: 12 hours. Potatoes: Apply Chateau prior to cracking. Use sufficient water volume for thorough coverage. For best results avoid mechanical incorporation into the soil or disturbance of the soil surface as this will reduce weed control. Chateau may be applied to potatoes after hilling. A minimum of 5 cm of soil must cover the vegetative portion of the potato plant at the time of Chateau. Re-entry interval: 12 hours 7

8 Crop Specific Application Instructions continued: Celery: Adequate water volume is required for thorough coverage. Apply Chateau as a hooded or shielded application to row middles prior to transplanting for pre-emergence control of the weeds. For best results plants should be grown on raised or plastic mulched beds that are at least 10 cm higher than the treated row middle and the mulched bed must have a minimum of a 60 cm bed width. Re-entry interval: 12 hours. Field Peppers: Apply using adequate water volume for thorough spray coverage. For best results apply Chateau as a hooded or shielded application to row middles prior to transplanting for pre-emergence control of the weeds. Plants should be grown on raised or plastic mulched beds that are at least 10 cm higher than the treated row middle and the mulched bed must have a minimum of a 60 cm bed width. Do not apply during or after bloom. Dry Bulb Onions: For best results apply to transplanted onions between the 2-leaf and 6-leaf stage and on direct seed onions between the 3-leaf and 6-leaf stage prior to emergence of weeds. Ensure thorough coverage during application. Asparagus: For best results apply to dormant asparagus (established for at least 1 year) no less than 14 days before spears emerge and prior to weed emergence. Apply using adequate water volume for thorough spray coverage. Stone Fruit, Untreated Check, WA

9 Mixing Instructions: 1. Fill clean spray tank 1/2 to 2/3 of desired level with clean water. Engage gentle agitation. 2. While agitating, slowly add Chateau Herbicide WDG to the spray tank. Agitation should create a rippling or rolling action on the water surface. 3. If tank mixing Chateau Herbicide WDG with other labeled herbicides, add water-soluble bags first, followed by dry formulations, flowerless, emulsifiable concentrates and then solutions. Prepare no more spray mixture than is required for the immediate spray operation. 4. Add adjuvants or surfactants, if recommended. 5. Fill spray tank to desired level with water. Agitation should continue until spray solution has been applied. Mix only the amount of spray solution that can be applied the day of mixing. Chateau Herbicide WDG should be applied within 6 hours of mixing. British Columbia, 2005 Stone Fruit, 0.4 lb ai/a lb ai/a, WA

10 10 Notes:

11 Notes: 11

12 Nufarm is the marketer of Valent products in Canada. To learn more about Chateau or any other Nufarm products visit our website or call our technical support line, toll-free This information is for marketing purposes only. ALWAYS READ AND FOLLOW THE LABEL BEFORE USING ANY NUFARM PRODUCTS. Chateau is a registered trademark of Valent U.S.A. Corporation. January 2013