Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Insect pests succession on cowpea, Vigna unguiculata (L.) Walp., under Hisar (Haryana) agroclimatic conditions.

Abstract

In a study conducted in Hisar, Haryana, India, during the kharif of 2001, the insect pests on cowpea (cultivars CS 88, Pusa Phalguni and HFC 42-1) grown under protected (sprayed with 0.07% endosulfan 35 EC at 45, 55 and 65 days after germination) and unprotected conditions were investigated. Nineteen insect pests on cowpea from germination until harvest and 9 natural enemies were observed. Based on population build-up and percent incidence, the 4 major insect pests were leafhopper (Empoasca kerri; 2.61 nymphs per plant), whitefly (Bemisia tabaci; 2.74 nymphs per plant), pod borer complex (Euchrysops pandava pandava [Chilades pandava], Maruca testulalis [Maruca vitrata] and Helicoverpa armigera; 51.0%) and pod bugs (Clavigralla gibbosa, Nezara viridula and Riptortus pedestris; 10.2%). Anticarsia irrorata, Margaronia indica [Diaphania indica] and E. pandava pandava are reported for the first time on cowpea. Stomoxys calcitrans is recorded for the first time as a larval parasitoid of Chrysodeixis chalcites and Anticarsia irrorata. The avoidable losses in grain yield due to damage by pests were 47.36, 43.77 and 60.53% in CS 88, Pusa Phalguni and HFC 42-1, respectively. The percent increase in grain yield due to the timely adoption of control measures was highest (153.40%) in HFC 42-1. Overall losses of approximately 56.56% could be avoided by the adoption of pest control measures.