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Sharma, P. K.
- Studies on the Coccinellid Predators of the Cabbage Aphid Brevicoryne brassicae in Himachal Pradesh
Authors
1 Department of Entomology, Dr.Y.S.Parmar University of Horticulture and Forestry Solan, P.O. Nauni, 173 230, Himachal Pradesh, IN
2 Department of Entomology, Dr.Y.S.Parmar University of Horticulture and Forestry Solan, P.O. Nauni 173 230, Himachal Pradesh, IN
Source
Journal of Biological Control, Vol 7, No 1 (1993), Pagination: 15-19Abstract
Surveys conducted during 1985-91 on cauliflower, cabbage and knol-khol yielded thirteen species of coccinellid predators on nymphs and adults of the cabbage aphid, Brevicoryne brassicae (Linn.), a serious pest of cole crops in the mid-hill regions of Himachal Pradesh. Among the frequently occurring species, adults of Adonia variegata (Goeze) were the first to resume activity by first week of February followed by Coccinella septempunctata Linn. in the first week of March, while most other coccinellids were active during the last week of March or later. C. septempunctata was the most abundant species accounting for 47.3 per cent of the adult count, followed by A. variegata (26.2%). The hyperparasitoid, Oomyzus scaposus (Thompson) (-Tetrastichus coccinellae Kurdj.) (Hymenoptera, Eulophldae) was recorded on the coccinellid predators during May-June. C. septempunctata was more voracious than A. variegata and Adalia tetraspilota Hope. The average consumption by C. septempunctata grub, was 323 and that of adults 3890 aphids.
Keywords
Brevicoryne brassicae, Natural Enemies, Adonia variegata, Adalia tetraspilota, Coccinella septempunctata, Hyperparasitoid Oomyzus scaposus.Full Text
- Record of Prostigmatid Predatory Mites from Himachal Pradesh
Authors
1 Department of Entomology, CSK Himachal Pradesh Krishi Vishvavidyalaya, Palampur 176062, Himachal Pradesh, IN
Source
Journal of Biological Control, Vol 33, No 4 (2019), Pagination: 348-352Abstract
A survey was conducted to study the prostigmatid predatory mites in different agro climatic zones of Himachal Pradesh. Plant samples collected from agriculturally important crops showed presence of predatory mites belonging to five families and six genera. Eight species, viz., Agistemus sp. nr. edulis, A. industani Gonzalez-Rodriguez, A. javanicum Gupta, A. lakoocha Gupta, Pronematus sextoni Baker, Paraerythraeus delhiensis Khot, Tydeus gossabaensis Gupta and T. ornamentalicus Gupta was reported for the first time from Himachal Pradesh. Distribution of prostigmatid predatory mites revealed that they were more diverse in Zone-I and Zone-II, whereas in Zone-III and IV unrelated species were recorded. P. sextoni established as dominant (15.90) species in the entire collection followed by eleven species, which were sub-dominant, and Pronematus delhiensis was recorded as sub-recident (0.75).Keywords
Agistemus, Himachal Pradesh, Predatory Mites, Prostigmatid.Full Text
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