Assessment of pest insects of Capsicum annuum L.1753 (Solanaceae) in a cultivation cycle in Yaoundé

  • C Djieto-Lordon
  • CR Heumou
  • PS Elono Azang
  • CD Alene
  • AC Ngueng
  • P Ngassam
Keywords: Spice, phenology, yield, IPM.

Abstract

Pepper, Capsicum annuum is appreciated in tropical regions for its taste and its ability to increase the appetite level of food. This study aimed at investigating pest insects’ diversity of pepper right from pricking out to harvest. It also examined how aphids and whiteflies populations vary in the plant’s life cycle and specific fruit pests’ effects on the yield. During five months, individual plant organs were examined weekly. Insects encountered were captured, counted and identified. Immature stages were bred for identification purposes. Regular sampling allowed us to identify 28 species from 7 orders. During the pre-flowering phase, 5 orders were obtained: Hemiptera, Hymenoptera, Coleoptera, Lepidoptera and Orthoptera. The same orders were found at Flowering-fruiting phase, with appearance of one new order, the Thysanoptera. At this stage, exponential
growth of Hemiptera and Hymenoptera was also observed. During  maturation, Diptera and Lepidoptera were the most abundant pests. Ceratitis capitata and Cryptophlebia leucotreta were responsible for yield losses (20.46%). Aphids and whiteflies affected plant’s fitness, either directly through sap sucking or indirectly through viral transmissions. Ants’transport, disseminate and protect Hemipterans. Since plants phenology influences pest diversity, it should be taken into account in the efforts of developing IPM strategies.

Keywords: Spice, phenology, yield, IPM.
Published
2014-08-28
Section
Articles

Journal Identifiers


eISSN: 1997-342X
print ISSN: 1991-8631