The apple leaf-curling midge, Dasyneura mali Kieffer, seasonal history, varietal susceptibility and parasitism 1955-58
1959; Taylor & Francis; Volume: 2; Issue: 5 Linguagem: Inglês
10.1080/00288233.1959.10423254
ISSN1175-8775
Autores Tópico(s)Forest Insect Ecology and Management
ResumoSummary During the 1955-56 and 1956-57 seasons at Palmerston North, the apple leaf-curling midge, Dasyneura mali Kieffer, reached significant proportions. Infestation in 1957-58 was less than in the previous two seasons. There are normally five generations of the midge between early October and late April. The parasite, Prosactogaster demades Walker, attains a generally high level of parasitism of D. mali, but its failure to check the second generation restricts its effectiveness as a controlling agent. The use of suitable chemicals to control the second generation would complement the parasite during this period. No apple varieties are entirely immune, and the degree of susceptibility and infestation is determined by the quantity of terminal growth present. No marked varietal preference was detected.
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