First record of natural enemy, Trechnites aligharhensis on Trioza fletcheri minor Crawford, a major pest on Terminalia arjuna and Terminalia tomentosa


Affiliations

  • Basic Seed Multiplication and Training Centre, Kharsawan, Jharkhand, 833216, India
  • Central Silk Board, Bilaspur, Basic Tasar Silkworm Seed Organization, Chhattisgarh, 495112, India
  • Jayashankar Telangana State Agricultural University, Department of Entomology, Hyderabad, Telangana, 500030, India
  • Basic Seed Multiplication and Training Centre, Balaghat, Madhya Pradesh, 481001, India
  • Basic Seed Multiplication and Training Centre, Madhupur, Jharkhand, 815353, India
  • Basic Seed Multiplication and Training Centre, Kathikund, Jharkhand, 814103, India

Abstract

Studies have been carried out on exploration of natural enemies of the Psyllid bug, Trioza flecheri minor on Terminalia spp., the primary host plantations of tasar silkworm during April to November, 2020. The results of the studies indicated that among the natural enemies recorded on T. flecheri minor, the Trechnites aligarhensis Hayat, Alam and Agarwal was the major encyrtid parasitoid. The incidence of T. f. minor was significantly more on T. arjuna (22.98% galls) compared to T. tomentosa (12.59% galls) and peak incidence was observed during the August and September months. The parasitization of T. aligarhensis on T. f. minor was significantly more on T. arjuna (33.13%) as compared to T. tomentosa (24.92%).


Keywords

Galls, parasitisation, Tasar silkworm, Trechnites aligarhensis, Trioza flecheri minor

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