Natural enemies of Pentalonia nigronervosa Coq. (Hemiptera: Aphidoidea), the vector of abaca and banana bunchy-top virus

Issue Date

4-2008

Abstract

Four species of coccinellids (Ladybird beetles), one species of hymenopterous parasitoid of 28 species of spiders were collected from abaca and banana plants and identified. The coccinellids are Scymnus (Pullus) frontalis quadripustulatus (Herbst), S.(P.trukensis Chapin, Scymnus sp., and Acarinus philippinensis Kapur. S.(P.) trukensis was most abundantly found among colonies of P.nigronervosa. The aphidophagous parasitoid was Aphidus sp. The life histories of the four species of coccinellids were studied. All had four larval instars and a total developmental period of 18-24 days. The spiders are as follows: Araneus sp., Argyrodes bonadea Karsch, Chiracanthium nr. ligawsolanum Barrion and Litsinger, Cyclosa insulana Costa, and three other still unidentified Cyclosa species, Harmochinus brachiatus (Thorell), Hasarius adansoni (Savigny and Audouin), Hasarius sp. Leucage decorata Blackwell, Leucage sp. 1and 2, Lycosa pseudoannulata, Baes et Str., Minemerus sp., Oxyopes javanus Thorell, O.lineatipes, (C.L.Roch), Pardosa sp., Rucinea sp., Tetragnatha nr. virescens Okusa, T.maxillosa, Thomisia sp. In addition, spiderlings of the families Salticidae and Sparasidae were also collected. Seven parasitoid species were also collected from other aphid hosts, namely, Binodoxys communis (Gahan) on Aphis gossypii Glover, A.glycines Matsumura and Toxoptera citricidus (Kirkaldy); Lipolexis scutellaris Mackauer on A.gossypii, A.craccivora Koch and Melanaphis sacchari f.indosacchari David; Aphidius sp. 2 on Myzus persicae (Sulzer); Aphidius sp. 3 on Ceratovacuna lanigera Zehnther, Aphidius sp. 4 on Sitobion ibarae (Matsumura); Aphidius gifuensis Ashmead on Myzus persicae; and Aphelinus sp. on Aphis craccivora. The acceptability and suitability of P. nigronervosa as host to B. communis were tested in the laboratory. Females of this parasitoid collected from T. citricidus disregarded the banana aphids. Those originating from mummified A. glycines attacked the banana aphids but no mummies appeared. Females of the same parasitoid emerging from A. gossypii infesting potato produced mummies and adult parasitoids but a permanent culture under artificial conditions was difficult to maintain due to inadequate rearing facilities.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

22

Issue

1

Page

53-70

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

PENTALONIA NIGRONERVOSA; COCCINELLIDAE; BANANA BUNCHY TOP VIRUS; PLANT PESTS; PARASITOIDS; VECTORS; VIRUSES; NATURAL ENEMIES

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