Efficiencies of three insect collection methods in Lamto, Cte dIvoire

Abstract

Insects are of ecological and economic importance. This study was carried out to compare the efficiency of the three main insect sampling methods namely, sweep net, hand sampling and the light trap and also to show the biodiversity distribution from Lamto habitats for good biological conservation. A total of 379 individuals belonging to 9 orders were collected. Significantly, more individuals were collected by sweeping net compared to hand sampling and light trap. From the capture rate, highest rate was recorded for sweeping net (0.720) followed by hand (0.232) and light trap (0.047). The lowest value of Shannon's index was 0.672 with the light trap followed by hand (1.375) and the highest was 1.940 with sweeping net in Lamto's habitats. The insect orders recorded with the hand were Heteroptera, Coleoptera, Homoptera, Hymenoptera, Orthoptera, Diptera and Isoptera (F = 11.340, P value = 0.006). Light trap was more suitable to capture Lepidoptera (3.250%), Coleoptera (0.750%) and Homoptera (0.500%) (F= 6.659, P value= 0.0001). The abundance index recorded with the sweeping net commonly varied between 0.0 and 18.250%. Both sweeping net and hand insect sampling techniques were the most efficient and showed the highest insect orders complementarity. However, the use of sweep net, hand sampling and light trap were recommended to have good collection of insects.

Vertical Stratification of Beetles in Deciduous Forest Communities in the Centre of European Russia

“…The use of various types of traps can influence the results of studies [28][29][30][31]. However, the use of traps with various baits and attractants and traps without baits give similar results.…”

Diversity of Coleoptera on Cucumber in the Tonkpi Region of Man, Côte d’Ivoire

“…During these observations, the number of coleopteran adults on the cucumber plants and their damage to the cucumber leaves were recorded. Coleopteran species collected with the trap and by direct observations, were then grouped by similarity and preserved in 70% alcohol, then identified using a binocular magnifying glass and the dichotomous keys of literature, such as Roth (1974), Delvare and Aberleng (1989).The specific richness (S) corresponds to the total number of beetle species sampled in an area were recorded.The abundance index (AR) and the occurrence frequency (Fo) were calculated according to the formula used by Dajoz (1982Dajoz ( , 2006, Diabaté et al (2020b) and Akpesse et al (2022a, b). Based on the values obtained, a species is classified as rare (Fo< 5%), incidental (5% ≤ Fo< 25%), frequent (25% ≤ Fo< 50%), constant (50% ≤ Fo< 100%) or ubiquitous (Fo= 100%).…”

“…Based on the values obtained, a species is classified as rare (Fo< 5%), incidental (5% ≤ Fo< 25%), frequent (25% ≤ Fo< 50%), constant (50% ≤ Fo< 100%) or ubiquitous (Fo= 100%). The attack rate by the coleoptera on cucumber plants and fruits was calculated using the following formula of Diabaté et al (2020b;.The damage intensification index was used to determine the degree of insect attack on plants. It was calculated according to the formula used by Aléné et al (2006), Kuate et al (2019) and Diabaté et al (2023).…”

“…However, cucumber production is affected by a number of factors, including climate and insect pests such as beetles. Some coleopteran species are beneficial insects for crops, while others are pests (Premalatha et al, 2011;Diabaté et al, 2020b). Leaf beetles are one of the largest families among beetles and are economically important insects (Jolivet, 2015;Rekha et al, 2023).…”