Pea & bean pests

Pea & Bean weevil (Sitona lineatus)
  • Spring sown pea and bean crops are susceptible to damage during early establishment.
  • Feeding damage causes characteristic notching of leaves.
  • Badly affected crops can be slow to recover, reducing yield.
  • Slow growing autumn crops may also be attacked.

Treat spring sown crops with HALLMARK ZEON or DOVETAIL when pest pressure is causing visible signs of attack and slow crop growth is affecting recovery. Treat backward winter crops when under severe attack.

Pea aphid (Acyrthosiphum pisum)
  • Pea aphids cause extensive feeding damage in all pea crops.
  • Numbers can build very rapidly in just 2-3 days.
  • Regular inspection of crops through May and June is essential.
  • Treatment thresholds:
    Combining peas: 20% of plants infested
    Vining peas: 15% of plants infested

Apply APHOX or DOVETAIL when thresholds are reached. Prioritise treatments between early flowering and the first 4 trusses of pod set. HALLMARK ZEON may be used where aphid numbers are low and the pest is readily found in the crop.

Pea midge (Contarinia pisi)
  • Pea midge feeding damages flower buds and reduces yield.
  • Localised heavy infestations can occur.
  • Inspect crops regularly during May and June.

Treat with HALLMARK ZEON or DOVETAIL when 1 or more midge are found in 1 in 5 of a plant's leading shoots. Monitoring systems are available to identify Pea midge attacks and optimise spray timing.

Bean seed beetle (Bruchus rufimanus)
  • Bean seed beetle (Bruchid beetle) has become a major pest of bean crops destined for human consumption.
  • Larvae feeding causes holes in beans that are unmarketable for premium export trade.
  • Affected beans grown for seed are unviable.

New advice on application timing indicates treatment after 2 consecutive days of temperatures of 20°C or more, when the female Bean seed beetle (Bruchid beetle) starts to lay eggs, will give the most reliable results. Ensure good spray coverage. Field trials have shown useful activity with HALLMARK ZEON.

Silver Y moth (Autographa gamma)
  • Large numbers of Silver Y moth can migrate in from southern Europe.
  • Moth caterpillars cause significant damage feeding on pea and bean crop foliage.
  • Early migration of adult moths into the UK can result in up to 3 generations of caterpillars.

DOVETAIL application for aphids and Pea moth may also provide incidental control of Silver Y moth caterpillars.

Black bean aphid (Aphis fabae)
  • The Black bean aphid colonies can develop quickly to epidemic levels and create a major pest.
  • Aphids can transmit viruses that further reduce yield.
  • Most damaging where infestation occurs just prior to flowering.

Treat with APHOX or DOVETAIL as soon as aphid activity is found building up in the crop. Quick aphid knockdown and repellency activity can reduce crop damage.

Bean seed fly (Delia platura)
  • Can occur from April to September, with peak activity typically in May. Up to four life-cycles can occur per season.
  • Larvae hatching in the soil attack and can kill emerging seedlings; less severe attacks cause weakening and wilting of plants.
  • High organic soils most at risk.

Treat with HALLMARK ZEON or DOVETAIL when 1 or more midge are found in 1 in 5 of a plant's leading shoots. Monitoring systems are available to identify Pea midge attacks and optimise spray timing.

Field thrips (Thrips angusticeps)
  • Field thrips cause damage by feeding on the leaf surface of emerging seedlings, which may turn pale in colour.
  • Affected leaves appear thicker and deformed.

PGRO trials have shown that Field thrip damage can be minimised by an application of HALLMARK ZEON when there is evidence of pest activity, and repeated 10 days later.

Pea moth (Cydia nigricana)
  • Widespread pest of vining and combining pea crops.
  • Most damaging for peas destined for human consumption or seed.
  • Larvae feed on developing peas with damaging affect on quality and yield.

Use pheromone traps in crop to identify presence
of adult Pea moth. Apply HALLMARK ZEON or DOVETAIL if any Pea moths are caught between first flower and pod formation in vining peas.

Pea & bean crop pest attack timings

TOP TIPS for Pea & bean pest control

  • Inspect crops regularly during periods of high risk.
  • Unseasonable weather can allow early or prolonged pest attacks.
  • Application with angled nozzles has been shown to enhance spray penetration and improve pest control.
  • Medium to fine droplets adhere best to the waxy cuticle of pea and bean crop leaves.
  • Twin cap bayonets fitted with two 02 or 03 nozzles have proven highly effective.
  • During prolonged periods of pest attack, a second insecticide application may be required.
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