STABILITY AND SELECTIVITY OF SOME HERBICIDES, HERBICIDE COMBINATIONS AND AN HERBICIDE TANK MIXTURE ON CHICKPEA (CICER ARIETINUM L.) PUBLISHED

Grozi DELCHEV delchevgd@dir.bg
The research was conducted during 2016 - 2018 on pellic vertisol soil type. Under investigation was chickpea cultivar Kabule (Cicer arietinum L.). Factor A included the years of investigation. Factor B included untreated control and 4 soil-applied herbicides – Dual gold 960 EC (S-metolachlor) - 1.5 l/ha, Stomp aqua (pendimethalin) - 3 l/ha, Merlin flex 480 SC (isoxaflutole) - 420 g/ha and Pelican 50 SC (diflufenikan) - 250 ml/ha. Factor C included untreated control, 3 foliar-applied herbicides – Pulsar 40 (imazamox) - 1.2 l/ha, Challenge 600 SC (aclonifen) - 4 l/ha and Shadow 3 ЕC (clethodim) - 1.6 l/ha and 1 herbicide tank mixture – Challenge 600 SC (aclonifen) - 4 l/ha + Shadow 3 ЕC (clethodim) - 1.6 l/ha. Soil-applied herbicides were treated during the period after sowing before emergence. Foliar-applied herbicides were treated during 6 - 8 real leaf stage of the chickpea. All of herbicides, herbicide combinations and herbicide tank-mixture were applied in a working solution of 200 l/ha. Mixing of foliar-applied herbicides was done in the tank on the sprayer. The highest yields of chickpea seeds are obtained by foliar treatment with herbicide tank-mixture Challenge + Shadow after soil-applied herbicides Pelican and Merlin flex. High yields are obtained also by foliar treatment with herbicide tank-mixture Challenge + Shadow after soil-applied herbicides Stomp aqua and Dual gold. Untreated control, herbicide combination Pelican + Pulsar and separated use antigraminaceous herbicide Shadow are the most unstable for seed yield. Combinations of herbicide tank-mixture Challenge + Shadow with soil-applied herbicides Merlin flex and Pelican are technological the most valuable. They are followed by combinations of herbicide tank-mixture Challenge + Shadow with soil-applied herbicides Stomp aqua and Dual gold. They combine high seed yield with high stability with relation to different years. Separated uses of soil-applied herbicides Pelican, Merlin flex, Stomp aqua and Dual gold, and their combined uses with antigraminaceous herbicide Shadow, and also herbicide combination Pelican + Pulsar have low estimates and do not be used. For complete control of all weeds and self-sown plants in chickpea crops, two herbicides should be combined - both soil-applied and foliar-applied.
chickpea, herbicides, herbicide combinations, seed yield, selectivity, stability
Field crops and pastures
Presentation: poster

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