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Insecticidal Control of the Cabbage Leaf Miner, Phytomyza rufipes Meig., attacking Calabrese
Author(s) -
Coaker T. H.
Publication year - 1973
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1973.tb01772.x
Subject(s) - biology , dimethoate , larva , toxicology , leaf miner , horticulture , agronomy , botany , pesticide
SUMMARY Damage caused by larvae of Phytomyza rufipes to the ‘spears’ of calabrese can reduce the quality of crops grown for processing. During 1969–71 inclusive, over 80 per cent of the plants in crops grown for a once‐off harvest were attacked by the miner. Eggs are laid on all the main‐stem leaves, but preference for the second to fourth leaves as oviposition sites caused peak attacks to occur at this stage of growth in the crops. Weekly sprays of 0·1 per cent active ingredient of azinphos‐methyl, dimethoate or trichlorphon applied over the full six‐week period of attack reduced the damage by about 90 per cent, compared with a 70 per cent reduction when trichlorphon was applied over the period of peak attack.