Lethal and Sublethal Toxicity of Insecticides to the Lacewing Ceraeochrysa Cubana

Abstract

The lethal and sublethal effects of 11 insecticides on the predator Ceraeochrysa cubana (Hagen) were assessed under laboratory conditions. First-instar larvae and adults ≤ 48 h old were sprayed with the highest insecticides doses allowed to control Diaphorina citri Kuwayama in the citrus crop. The survival and duration rates of the different development stages, sex ratio, pre-oviposition period, fecundity, and fertility of the insects were evaluated. In the larval bioassay, chlorpyrifos and malathion had lethal effect which none larvae survived. Azadirachtin, lambda-cyhalothrin + chlorantraniliprole, lambda-cyhalothrin + thiamethoxam, and thiamethoxam had lethal and sublethal effects that did not allow to estimate the life table parameters because the low number of couples formed. Esfenvalerate, imidacloprid WG and SC, phosmet, and pyriproxyfen had sublethal effects which were reflected in the net reproductive rate and in the intrinsic rate of natural increase. In bioassay using adults, none of the individuals survived in the chlorpyrifos, lambda-cyhalothrin + chlorantraniliprole, lambda-cyhalothrin + thiamethoxam, malathion, or thiamethoxam treatments, and the azadirachtin, esfenvalerate, imidacloprid WG and SC, phosmet, and pyriproxyfen treatments were significantly lower compared to the control. None of the insecticides was harmless to first-instar larvae and adults of C. cubana under laboratory conditions showing their potential to reduce the efficiency of this predator.

Evaluation of the Toxicity and Sublethal Effects of Acetamiprid and Dinotefuran on the Predator Chrysopa pallens (Rambur) (Neuroptera: Chrysopidae)

“…Acetamiprid and dinotefuran had no significant negative effects on adult longevity, fecundity, oviposition days, preadult survival rate, r, λ, R 0 , T, and GRR of the C. pallens population. Our results are consistent with the results of other studies: imidacloprid had no negative effects on the fertility, R 0 , r, and T of Ceraeochrysa cubana [39]; imidacloprid and thiamethoxam had no significant effects on the population parameters (R 0 , r, and T) of Iphiseiodes zuluagai [40]; and thiamethoxam had no significant effect on adult longevity and fecundity of H. variegata [38]. However, other studies have reported that neonicotinoid insecticides induce great damage to beneficial arthropods.…”

Impact of indoxacarb and sulphur formulation on aphid and three specific predators in Okra fields

“…Results were agreed with those reported by , who reported the adverse impact on this predator. Also, our results matched those reported by Rugno et al (2019) when they studied the impact of 11 insecticides on the predator Chrysoperla cubana from first instar larvae to adults; he reported that showing the negative effects of these tested insecticides.…”

Insecticidal and Repellent Comparative Toxicant Efficacy Against Papilio Demoleus (L.) Infesting Citrus Limon

“…The sub-lethal and lethal effects of 11 insecticides were assessed against Ceraeochrysa cubana. The malathion and chlorpyrifos were observed with lethal effects and lambda cyhalothrin+ chlorantraniliprole, azadirachtin, thiamethoxam+lambda-cyhalothrin, thiamethoxam with sub-lethal effects (Rungo et al, 2019). ANOVA was found with a significant difference (DF= 5; F= 225.68; P= 0.03) on post-spray days.…”