Site specific herbicide application through a multiple sprayer

H. Oebel, R. Gerhards, G. Beckers, R. Lock

Introduction

For site-specific weed control sprayers with variable doses and selective use of herbicides are needed.

Solutions:

Implementation

Sprayer Scheme
Sprayer control system for site-specific herbicide application with three separated hydraulic circuits
falt-015.jpg Multiple sprayer
Multiple sprayer for selective application of three herbicide mixtures

Dosage schedule for herbicides

Through a central control unit (Figure below) individual thresholds for weed classes and herbicide doses can be determined. The herbicide amount is calculated and documented. No herbicides remain in the tank.
Control software
Control software with individual adjustment of thresholds and herbicide doses
Kulturpflanze Galium aparine Gräser Unkräuter
0 70 85 100 0 70 85 100 0 70 85 100
Sommergerste <0,2 ≥0,2 ≥1 ≥1 <10 ≥10 >15 >25 <15 ≥15 >25 >25
Wintergerste <0,2 ≥0,2 ≥1 ≥1 <10 ≥10 >20 >30 <15 ≥15 >25 >40
Winterweizen <0,2 ≥0,2 ≥1 ≥1 <5 ≥5 >10 >15 <15 ≥15 >25 >40
Mais <0,2 ≥0,2 ≥1 ≥1 <5 ≥5 >10 >25 <5 ≥5 >10 >25
Zuckerrübe <0,2 ≥0,2 ≥1 ≥1 <2 ≥2 >5 >10 <3 ≥3 >5 >10
Winterraps <0,2 ≥0,2 ≥1 ≥1 <3 ≥3 >10 >15 <5 ≥5 >10 >25

Applied herbicides doses (100%, 85%, 70% and untreated 0%) depending on weed density (plants/m�) for different classes of weed species in spring barley, winter barley, winter wheat, maize, sugar beet and winter rape

Conclusion

The multiple sprayer allows a selective application of three different herbicides depending on the weed distribution and weed density through application maps. A user friendly control software permits an individual adjustment of weed thresholds and herbicide doses by the farmer. At the same time the herbicide treatment is documented.