AgPest Alert – 15 March 2019

Watch for clover flea damage

Region: Northland, Auckland, Bay of Plenty, Waikato

Northern North Island watch for clover flea damage to clover and treat early if required to maximise effectiveness.

Check pastures for Tasmanian grass grub damage

Region: Gisborne

In areas where Tasmanian grass grub can be a problem, damage may be seen. Check pastures particularly around stock camps and assess numbers to determine if insecticidal control is warranted. Large numbers have been observed in southern Waikato.

Dry weather leads to open pastures

Region: Northland, Auckland, Bay of Plenty, Waikato

Due to dry weather, the pastures are very open. There may be a flush of weeds after the first rain- treat if severe.

Pennyroyal can also become dominant after a drought and would need to be treated with 2,4-D early in spring if a problem.

Plantain moth numbers building

Region: All NZ

Plantain moth numbers are building up and may increase dramatically after rain if warm conditions continue. Check with agchem reps. for insecticide options.

Continued vigilance with velvetleaf

Region: All NZ

In 2016 velvetleaf seed was introduced to NZ as a contaminant of fodder beet seed and planted in many properties throughout NZ. To date, more than 250 properties have been found to be infested with this terrible weed. Six different lines of fodder beet seed have been identified as contaminated but there could be others that were not picked up. Similarly, there may be paddocks where velvetleaf was present but not found. Therefore, if you have either grown fodder beet or received fodder beet onto your property you need to be vigilant and keep an eye out for this weed and do not let it establish on your property. Last year was a cool year and no velvetleaf was found in the SI but it was found at some NI sites. This year is much warmer and more velvetleaf is expected to germinate. Velvetleaf is declared Unwanted Organism by MPI and occurrences must be reported and dealt with. For more information phone the MPI hotline 0800 80 99 66, visit MPI or AgPest online or contact your regional council.

Check feed-out areas for weeds

Region: Northland, Auckland, Bay of Plenty, Waikato

If importing hay from other farms/regions, be aware of unwanted weeds – many weed seeds can survive in and be spread via hay. Record the areas where hay has been fed out and regularly check these areas for new weeds after autumn and late spring rains- get rid of unwanted weeds before they become established! If you don’t recognise a weed get it identified.

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