All entries for Saturday 20 August 2016

Captures of aphids in Rothamsted suction traps

A new edition of the Rothamsted Insect Survey Aphid Bulletin has been published (week ending 14th August). The latest edition of AHDB APHID News is here.

• The peach–potato aphid was caught in ones and twos at four sites this bulletin week.
• The numbers of willow ̶carrot aphid (Cavariella aegopodii) flying are low everywhere.
• Three currant-lettuce aphids (Nasonovia ribisnigri) were caught at Starcross.
• Numbers of parsnip aphids are low (Cavariella pastinaceae York 2, Broom's Barn 2, Rothamsted 7 and Ascot 4, Cavariella theobaldi Starcross 1).
• Numbers of the black bean aphid (Aphis fabae) remain very low, it was caught at five sites, with highest numbers at Dundee (6).
• The pea aphid was caught at nine sites with highest numbers at Kirton (22).

Rosemary Collier : 20 Aug 2016 08:32 |  Comments (0) |  Close comments |  Report a problem

Pest update for Friday 19th August

Since Tuesday we have captured:

In pheromone traps (2 per species):

• Turnip moth = 0
• Silver Y moth = 0
• Cabbage moth = 0
• Diamond-back moth = 0

On 3 sticky traps:

• Carrot fly = 19 (in second sowing)

In 3 water traps:

• Cabbage root fly males = 3
• Cabbage root fly females = 12
• Bean seed flies = 3
• Flea beetles = 51
• Pollen beetles = 17
• Small white butterfly = 2
• Large white butterfly = 0
• Cabbage stem weevil = 1

Cabbage root fly eggs = 52 (15 plants)

On our untreated brassicas there are some cabbage aphid colonies and a developing infestation of cabbage whitefly.

Rosemary Collier : 20 Aug 2016 08:23 |  Comments (0) |  Close comments |  Report a problem