Year: 1998
Type: other
Abstract: Nine trials were conducted over three years at three sites to evaluate the efficacy of\nreduced rates of various fungicide products for their biological efficacy in\ncontrolling stem, foliar and ear diseases of winter wheat as well as their effects on\nyield and grain quality, and to compare the relative profitability of full and\nreduced rates of fungicides.\nThe results show that the use of half rates can give an economic benefit over that\nof full rates in many situations.\nIn circumstances where variety or seasonal factors resulted in low to moderate\nfoliar disease pressure the use of half rates gave similar yields to that of full rates.\nWhere foliar disease pressure was high, half rates generally gave lower yields than\nfull rates but the amount of the reduction varied with the fungicide product used.\nThe use of spray additives improved the yield response of the half rate treatments\nin most cases. Disease levels (septoria) were higher in treatments where half rates\nwere used, compared with the corresponding full rates, but the used of spray\nadditives improved the disease control in the half rate treatments.\nThe timing of spray applications is critical when half rates of fungicides are being\nused. Reduced rate treatments need to be applied more frequently. In these trials\nreduced rate treatments were applied as a three-spray programme rather than the\nconventional two-spray programme.
Author: B. Dunne
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W2759684728