Nalini, T. 2016 Field Incidence of Mealybugs and its Parasitization by Encyrtids in Various Crop Ecosystems. Plant Archives 15(2): 671-676
Notes: Field incidence of mealybugs and its parasitization by encyrtids were carried out at Annamalainagar during two subsequent years 2008 and 2009 on cotton, sunflower, brinjal, tomato, bhendi, mesta, guava and china rose. The results revealed that Phenacoccus solenopsis incidence was high on Gossypium hirsutum (55.10) and Hibiscus rosa-sinensis (59.20) during August, 2009. Its parasitoid Aenasius bambawalei was recorded with high per cent parasitism on G. hirsutum (August, 2008) and H. rosa-sinensis (July, 2009). Ferrisia virgata population on G. hirsutum was more during August than next two months of 2009 and the per cent parasitization of Aenasius advena also followed similar trends as F. virgata during August and consecutive two months. On Psidium guajava, parasitization by Blepyrus insularis was found only during August of 2009; F. virgata population was highest (17.80) in July 2009; per cent parasitization by A. advena also followed the similar trends. Maconellicoccus hirsutus population on Abelmoschus esculentus decreased steadily from July to September 2009; per cent parasitization by Anagyrus dactylopii was the lowest (3.52) in July and the highest in August (25.00); parasitization by A. chrysos was found only during July and was very low (1.41). Coccidohystrix insolita population on Solanum melongena was high during both July, 2008 and 2009 and per cent parasitization of Leptomastix nigrocincta was less during the same period of both years.