​>>> Archive of 2016 Aphid numbers

​​​​​​​​​​​Winterton

T​his data shows aphid numbers up to week 48.​​ Trap samples are collected at the beginning of the week and are then sent to a laboratory where the aphids are sorted, identified and counted.  All aphids shown in these graphs are able to transmit Barley Yellow Dwarf Virus. The sensitive period for the wheat crop in Winterton is indicated by the red line on the x axis of each graph which is shown in weeks.  Aphid numbers above 100 could indicate possible problems for the specific area.  

Winterton week 48.jpg
 

Brits

T​his data shows aphid numbers up to week 48.​​ Trap samples are collected at the beginning of the week and are then sent to a laboratory where the aphids are sorted, identified and counted.  All aphids shown in these graphs are able to transmit Barley Yellow Dwarf Virus. The sensitive period for the wheat crop in Brits is indicated by the red line on the x axis of each graph which is shown in weeks.  Aphid numbers above 100 could indicate possible problems for the specific area.  During weeks 15 and 18 problems were experienced with the trap and these data might not be accurate.

Brits week 48.jpg
 

Groblersdal

 

 T​his data shows aphid numbers up to week 48. Trap samples are collected at the beginning of the week and are then sent to a laboratory where the aphids are sorted, identified and counted.  All aphids shown in these graphs are able to transmit Barley Yellow Dwarf Virus. The sensitive period for the wheat crop in Groblersdal is indicated by the red line on the x axis of each graph which is shown in weeks.  Aphid numbers above 100 could indicate possible problems for the specific area. 

Groblersdal week 48.jpg
 

Cookhouse

 T​his data shows aphid numbers up to week 47.​​   Trap samples are collected at the beginning of the week and are then sent to a laboratory where the aphids are sorted, identified and counted. ​Problems were encountered with sample collection in weeks where red and black blocks appear on the line, these data are best estimates based on calculations from continuous sampling and may not reflect actual weekly aphid numbers.

All aphids shown in these graphs are able to transmit Barley Yellow Dwarf Virus. The sensitive period for the wheat crop in Cookhouse is indicated by the red line on the x axis of each graph which is shown in weeks.  Aphid numbers above 100 could indicate possible problems for the specific area.

Cookhouse week 47.jpg
 

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