Exposure to cyantraniliprole causes mortality and disturbs behavioral and respiratory responses in the coffee berry borer (Hypothenemus hampei)

Abstract

BACKGROUND: Hypothenemus hampei Ferrari (Coleoptera: Curculionidae) is the main pest of coffee due to the damage caused to coffee berries. Effective management methods and prevention of insecticide resistance are urgently needed against this insect. Bioassays were conducted to assess the effects of the diamide insecticide cyantraniliprole on H. hampei. Cyantraniliprole is the most recent compound registered against this species after the phasing out of endosulfan, the main insecticide historically used against the coffee borer for the past 30 years. Toxicity, survival, progeny production, respiration rate, and behavioral responses to cyantraniliprole were evaluated. RESULTS:Cyantraniliprole was toxic to adult H. hampei (LC 50 = 0.67 mg mL −1 and LC 90 = 1.71 mg mL −1 ). Adult survival was 95% without exposure to cyantraniliprole, decreasing to 52% in insects exposed to LC 50 cyantraniliprole and 27% in insects treated with LC 90 cyantraniliprole. Furthermore, H. hampei showed reduced mobility on insecticide-treated surfaces. The insecticide also led to a decrease in the respiration rate of H. hampei for up to 3 h after exposure, altering behavioral responses and locomotor activity. CONCLUSION: Cyantraniliprole exhibits lethal and sublethal effects on H. hampei and can be used in rotation in integrated pest management programs for control of this species in coffee cultivation systems. Respiration rateRespiration rate bioassays were conducted for 3 h after H. hampei adults were exposed to cyantraniliprole (LC 50 and LC 90 values), Pest Manag Sci 2019; 75: 2236-2241

Acute Toxicity and Sublethal Effects of Lemongrass Essential Oil and Their Components against the Granary Weevil, Sitophilus granarius

“…Different respiratory responses have been reported for other insects exposed to essential oils and components in Podisus nigrispinus Dallas (Heteroptera: Pentatomidae) [ 51 ], Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) [ 63 ], and T. molitor [ 21 ]. Low respiratory rates result in high physical conditioning damage because the energy is reallocated at the expense of physiological processes [ 42 , 43 ] with the potential to affect muscle activity, causing permanent paralysis [ 43 , 45 ]. Inhalation of fumigant essential oils is associated with insect respiration rate [ 45 , 51 ].…”

“…Low respiratory rates result in high physical conditioning damage because the energy is reallocated at the expense of physiological processes [ 42 , 43 ] with the potential to affect muscle activity, causing permanent paralysis [ 43 , 45 ]. Inhalation of fumigant essential oils is associated with insect respiration rate [ 45 , 51 ]. Our results show that S. granarius exposed to lemongrass essential oil, geranyl acetate, and citral had a decrease in the respiration rates, suggesting a possible fitness cost and energy reallocation.…”

“…The measurement of the distance walked and time spent on each half-arena were obtained with the aid of a video tracking system (ViewPoint Life Sciences, Montreal, Canada). Weevils that spent <1 min or 50% of the time in the half-arena treated with components were considered repelled or irritated, respectively [44,45].…”

Acute toxicity, sublethal effect and changes in the behavior of Lasioderma serricorne Fabricius (Coleoptera: Anobiidae) exposed to major components of essential oils

“…(Missbach et al, 2014). These changes in insect behavior occur as a result of the action of toxic compounds on the nervous system, which stimulate or reduce the mobility of insects (Plata-Rueda et al, 2019). The opposite effect can also occur, the substance can attract insects.…”

Resistance of insecticide-treated coffee berries of different varieties to the penetration of Hypothenemus hampei (Coleoptera: Curculionidae: Scolytinae)

“…This insecticide acts on Ca 2+ channels (ryanodine receptors), causing muscle paralysis and feeding inhibition, being marginally toxic to mammals and selective to natural enemies (SHAD; SHAD, 2019). Chlorantraniliprole and cyantraniliprole are examples of insecticides based on diamide that caused mortality and reduced H. hampei motor and respiratory activities in several studies (GONRING et al, 2019;BANBA 2015;BANBA, 2016;PLATA-RUEDA et al, 2019). Another broad-spectrum insecticide, Metaflumizone, belongs to the semicarbazone group presenting very low acute and chronic toxicity to mammals (HEMPEL et al, 2007;TAKAGI et al, 2007).…”