Processors and Growers Research Organisation

Pea Moth

Forecasting has started for 2022.

Thresholds were reached in combining peas in many areas during the week beginning 6th June.

It’s important to monitor pea moth presence on your farm using pheromone traps to help us provide accurate spray forecasts or other management advice for you.

A spray date is displayed below during the forecasting period, based on a model prediction, and should be checked 3 - 4 days after reaching a threshold in your traps.

The forecast is also regularly updated on the PGRO pea and bean APP during the season.

Traps should be placed in pea crops in early to mid-May and monitored three times each week. In combining peas, a threshold is reached when 10 or more moths are caught in a trap on two consecutive occasions. In vining peas a lower threshold of damage is tolerated and traps should be used as an indication of moth presence.

Threshold dates may vary for different regions and it is important to monitor populations in your region to accurately predict spray date. Timing of sprays is related to egg development and this is affected by temperature. Control of the larvae must be carried out following egg-hatch and before they reach the pod, and the forecasting system accurately predicts this.

On the predicted spray date, crops which are at the first pod set stage or which have flowered should be sprayed, but later crops should only be sprayed when they reach first pod set. Crops with green pods are susceptible to damage. A second application should be applied 10-14 days later.

Predicted spray date for regions based on your threshold in pheromone traps

Threshold Date from your trap catches East S. East S. West E. Mids W. Mids Wales North Borders
01 Jun 17 Jun 16 Jun 16 Jun 17 Jun 16 Jun 17 Jun 17 Jun 18 Jun
03 Jun 18 Jun 17 Jun 18 Jun 18 Jun 18 Jun 18 Jun 19 Jun 19 Jun
06 Jun 19 Jun 20 Jun 20 Jun 19 Jun 20 Jun 20 Jun 20 Jun 21 Jun
08 Jun 20 Jun 21 Jun 21 Jun 20 Jun 21 Jun 22 Jun 21 Jun 22 Jun
10 Jun 21 Jun 22 Jun 23 Jun 21 Jun 22 Jun 23 Jun 24 Jun 25 Jun
13 Jun 24 Jun 25 Jun 26 Jun 24 Jun 25 Jun 26 Jun 26 Jun 27 Jun
15 Jun 26 Jun 27 Jun 27 Jun 26 Jun 27 Jun 28 Jun 27 Jun 28 Jun
17 Jun 29 Jun 28 Jun 29 Jun 29 Jun 29 Jun 30 Jun 30 Jun 30 Jun
20 Jun 2 Jul 2 Jul 2 Jul 2 Jul 2 Jul 2 Jul 2 Jul 2 Jul
23 Jun 5 Jul 5 Jul 5 Jul 5 Jul 5 Jul 5 Jul 5 Jul 5 Jul
25 Jun 7 Jul 7 Jul 7 Jul 7 Jul 7 Jul 7 Jul 7 jul 7 Jul
27 Jun 9 Jul 9 Jul 9 Jul 9 Jul 9 Jul 9 Jul 9 Jul 9 Jul
...