April is the month when winter barley crops develop the quickest and the demand for plant diet is at its highest.
Depending on the overall quantity of nitrogen (N) for use, growers ought to be sure that they apply the final cut up earlier than Growth Stage (GS) 32, in keeping with recommendation from Teagasc.
Barley crops don’t use late N effectively. In order to maximise yields, N should be working earlier than the flag leaf is seen. Manganese deficiency can also be fairly frequent in barley crops and wishes consideration.
Where disease control is anxious, Teagasc is reporting that the choice to make use of a two or three-spray technique will rely on the range and placement.
Growers ought to use a three-spray programme on inclined varieties (e.g., cassia), or the place illness ranges are average or excessive. This is very so particularly within the southern half of the nation.
However, with crops within the northern half of the nation on clear varieties, growers could possibly get away with two purposes.
A urged spray plan follows: First spray – GS30; second spray – GS31 to 33; and third spray – GS39 to 49.
Fungicides that can be utilized embody: Siltra at 0.6L/ha; Decoy copacks; Elatus Era at 0.8L/ha; MacFare Xpro or, Proline at 0.4L/ha plus a SDHI or strobilurin (Imtrex, Zulu, and many others.)
Where mildew is obvious, a mildewicide needs to be used. In addition, Folpet might be added to the final spray for the management of ramularia.
Plant progress regulator for winter barley and crops
Growers ought to purpose to use a plant progress regulator (PGR) on two-row varieties between GS32 and GS37 for efficient shortening.
Products that can be utilized on this context embody Terpal at 1.2-1.5L/ha, Cerone at 0.5-0.7L/ha and Meddax Max at 0.3-0.5kg/ha.
For six-row varieties or two-row varieties on very fertile websites, two purposes are usually required.
Growers ought to think about a mixture of Moddus at 0.2L/ha plus Chlormequat chloride (CCC) at 1.0L/ha round GS30 or 31. This can be repeated on the regular timing at GS32-37.
Farmers needs to be very watchful of the climate when making use of PGRs.
Frost will reduce the impact of the merchandise, whereas additionally rising the opportunity of scorching. Growers must also keep away from sophisticated mixes, as crops might be susceptible to scorch presently of 12 months.
Meanwhile in Northern Ireland, College of Agriculture, Food and Rural Enterprise (CAFRE) advisors are confirming excessive ranges of mildew and rhynchosporium an infection in some ahead winter barley crops.
The recommendation right here is to maintain fungicide charges excessive, significantly if a T0 fungicide was not utilized or T1 has but to go on.