With many forward wheat crops coming into ear it will not be long before T3 fungicides need to be applied. Although dry conditions earlier this spring helped reduce the development and spread of septoria, recent heavy downpours mean a robust fungicide will be required to maintain clean crops and prevent disease from moving up the canopy. Vigilance remains paramount on yellow rust prone varieties and in warmer temperatures brown rust may also prove to be a problem. For optimum control of fusarium, T3 products will need to be applied immediately prior to or as crops start flowering, therefore quality wheats may need to be prioritised.
Considerations are also being made as to requirements for T4 applications. The summer of 2012 proved the benefits of this timing in a high disease season; this year it’s a chance for a foliar top-up in what is undoubtedly an early crop, as well as being the timing for reduction of mycotoxins.
Untreated plots at local trials sites and spray misses on farm highlight the pressure we are under this season from disease (see pictured) – now is not the time to hold back as the potential for both yield and disease is high.
SDHI chemistry has done a fantastic job on both winter and spring barley crops – all of which look clean apart from some mildew in very lush or stressed crops. In these cases a specific eradicant mildewicide will be required. Spring barley is moving rapidly though its growth stages and many crops are not far from T2 timing. Depending on variety/disease pressure consider increasing T2 fungicide rates if necessary.
Beet crops have responded enthusiastically to recent rainfall. This has been both positive and negative – whilst helping beet to recover from previous herbicide applications it has also encouraged previously dry seed to chit, resulting in difficulties in controlling large weeds without damaging these small, tender and long-awaited plants. Typical leaf curling symptoms can be seen from sulfonylurea applications; where beet has taken a knock from herbicides or is showing any deficiencies, the 6-8 leaf stage is the ideal timing for a micronutrient tonic, especially where another herbicide is planned.
Vining peas look well: vigilance is required as usual to prevent pigeon and rook damage. Moist seed-beds mean a post-emergence herbicide application is likely on some crops.
With more rain forecast we will need to utilise every spray window to get jobs completed, now is certainly not a good time to get behind on any crop.