Control failure of Sri Lankan whitefly (Bemisia tabaci Genn.) is due to high resistance development against recommended insecticides

Marasinghe, J.P.; Hemachandra, K. S.; Nugaliyadde, L.; Karunaratne, S.H.P.P.

doi:10.4038/jnsfsr.v45i1.8034

Cited by 3 publications

(7 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, a 490-fold increase in resistance was observed after selection of B. tabaci (B biotype) for 30 generations with the imidacloprid [24]. Meanwhile, moderate to high resistance was observed, against the thiamethoxam and acetamiprid after selection of B. tabaci for five generations [25]. One other reason for such an increase in the resistance development could be the extensive use of insect growth regulators and neonicotinoids.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Resistance Development in Bemisia tabaci Genn. (Homoptera: Aleyrodidae) in Cotton against Different Insecticides

Khalid

Ahmed

Al-Ashkar

et al. 2021

Insects

View full text Add to dashboard Cite

Cotton is a major crop of Pakistan, and Bemisia tabaci (Homoptera: Aleyrodidae) is a major pest of cotton. Due to the unwise and indiscriminate use of insecticides, resistance develops more readily in the whitefly. The present study was conducted to evaluate the resistance development in the whitefly against the different insecticides that are still in use. For this purpose, the whitefly population was selected with five concentrations of each insecticide, for five generations. At G1, compared with the laboratory susceptible population, a very low level of resistance was observed against bifenthrin, cypermethrin, acetamiprid, imidacloprid, thiamethoxam, nitenpyram, chlorfenapyr, and buprofezin with a resistance ratio of 3-fold, 2-fold, 1-fold, 4-fold, 3-fold, 3-fold, 3-fold, and 3-fold, respectively. However, the selection for five generations increased the resistance to a very high level against buprofezin (127-fold), and to a high level against imidacloprid (86-fold) compared with the laboratory susceptible population. While, a moderate level of resistance was observed against cypermethrin (34-fold), thiamethoxam (34-fold), nitenpyram (30-fold), chlorfenapyr (29-fold), and acetamiprid (21-fold). On the other hand, the resistance was low against bifenthrin (18-fold) after selection for five generations. A very low level of resistance against the field population of B. tabaci, at G1, showed that these insecticides are still effective, and thus can be used under the field conditions for the management of B. tabaci. However, the proper rotation of insecticides among different groups can help to reduce the development of resistance against insecticides.

show abstract

Section: Discussionmentioning

confidence: 99%

Evaluation of Resistance Development in Bemisia tabaci Genn. (Homoptera: Aleyrodidae) in Cotton against Different Insecticides

Khalid

Ahmed

Al-Ashkar

et al. 2021

Insects

View full text Add to dashboard Cite

show abstract

“…From the 1990s, the control of B. tabaci adults began to be performed using neonicotinoid insecticides while the control of their nymphs was carried out with growth regulator insecticides (Naveen et al 2017;Horowitz et al 2002;Jeschke et al 2010). Currently, even with frequent insecticide use to control B. tabaci, failures in this pest control in various regions around the world have been reported (Barbosa et al 2014;Roditakis et al 2017;Marasinghe et al 2017;Dângelo et al 2018). These control failures may occur due to the selection of resistant populations or operational problems related to the application technology for these pesticides (Silva et al 2011;Gontijo et al 2013;Garcerá et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…A current challenge for whitefly integrated pest management (IPM) programs is to provide an efficient management of this pest that allows the conservation of their natural enemies. In this sense, many studies regarding the toxicity of pesticides for B. tabaci and their natural enemies have been reported (Dângelo et al 2018;Horowitz et al 2002;Marasinghe et al 2017;Roditakis et al 2017). However, many of these studies did not consider some of the most promising insecticides registered for control the whitefly such as acetamiprid, chlorfenapyr, imidacloprid, and thiamethoxam.…”

Section: Introductionmentioning

confidence: 99%

Toxicity and residual effect of selected insecticides against Bemisia tabaci and Orius tristicolor

Kon

Ramos

Silva

et al. 2023

RSD

View full text Add to dashboard Cite

The whitefly Bemisia tabaci is a global pest, well-known for its capacity to transmit begomoviruses during sap sucking (<24h). Chemical control is mainly adopted, aiming to kill the insect before it acquires and transmits virus. In the present study, we evaluated the toxicity of 17 insecticides on B. tabaci and subsequently determined the lethal time for this pest (only for the insecticides that caused B. tabaci mortality equal to or greater than 80%). Here, we present an efficient methodology for assessing the toxicity in the individual adult. We also provided an investigation regarding the residual effect of insecticides to control B. tabaci on cabbage in greenhouses. The selectivity of these insecticides for the predator minute pirate bug Orius tristicolor was also assessed. Bifenthrin, cartap, chlorfenapyr and chlorpyrifos caused ≥ 80% mortality on whitefly adults. They also showed fast lethal effect (<24 h), principally cartap, which caused 100% of mortality in only 45 min. However, these insecticides showed a short residual period of whitefly control (<3 days) and did not present physiological selectivity for O. tristicolor. In terms of whitefly management, only a few insecticides were efficient to avoid begomoviruse transmission. The short residual period and the absence of physiological selectivity for the predator suggests that the use of these products should involve a sustainable approach. Taking pest population levels into account when making control decisions and for predator preservation in the agroecosystems should positively contribute to more sustainable whitefly management.

show abstract

“…For example, whitefly ( Bemisia tabaci ), a major pest of vegetable crops and a plant virus vector in Sri Lanka, exhibited high resistance to etofenprox (a pyrethroid), moderate‐to‐high resistance to neonicotinoids (e.g. thiamethoxam and acetamiprid) and moderate resistance to carbosulfan (a carbamate), all of which are insecticides recommended by the DOA, SL 32 …”

Section: Introductionmentioning

confidence: 99%

“…thiamethoxam and acetamiprid) and moderate resistance to carbosulfan (a carbamate), all of which are insecticides recommended by the DOA, SL. 32 Indiscriminate use of pesticides and its repercussions encountered by humans and the environment warrant an introduction of a better pest management approach. Hence, integrated pest management (IPM) is promoted as a promising and practical option.…”

Section: Introductionmentioning

confidence: 99%

Assessment of management practices, awareness on safe use of pesticides and perception on integrated management of pests and diseases of chilli and tomato grown by small‐scale farmers in selected districts of Sri Lanka

Costa

Weerathunga

et al. 2021

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND In this study, we surveyed through a structured and pilot‐tested questionnaire, the practices of pesticide usage by small‐scale (< 1.25 ha) chilli and tomato farmers from four districts of Sri Lanka and their perceptions on the effectiveness of pesticides and willingness to adopt integrated pest management (IPM). RESULTS We found significant (P < 0.05) variation among districts in farmer responses to 37 out of 59 survey questions. A majority of farmers were dependent on pesticides with only a minority practicing IPM. A majority perceived that their current pesticide usage was increasing, but was not excessive. A majority were aware of the negative impacts of pesticides on human health and environment. Farmer perception on the effectiveness of pesticides increased with age, but was not influenced by education level. Farmers having a higher opinion of pesticides made a greater number of applications during a cropping cycle. They also maintained a longer preharvest interval and did not use pesticide mixtures. A majority expressed willingness to initiate IPM, but identified lack of knowledge and technical knowhow on specific IPM practices for their crops as barriers to adoption and requested external support. Farmer willingness to adopt IPM is higher among older, more educated farmers and among full‐time farmers who are currently totally‐dependent on pesticides and whose major income source was farming. CONCLUSION We conclude that a significant extension effort in terms of farmer education on IPM and external assistance to develop the technological knowhow, which is tailor‐made to specific districts, is needed to facilitate adoption of IPM among these farmers.

show abstract

Control failure of Sri Lankan whitefly (Bemisia tabaci Genn.) is due to high resistance development against recommended insecticides

Cited by 3 publications

References 3 publications

Evaluation of Resistance Development in Bemisia tabaci Genn. (Homoptera: Aleyrodidae) in Cotton against Different Insecticides

Evaluation of Resistance Development in Bemisia tabaci Genn. (Homoptera: Aleyrodidae) in Cotton against Different Insecticides

Toxicity and residual effect of selected insecticides against Bemisia tabaci and Orius tristicolor

Assessment of management practices, awareness on safe use of pesticides and perception on integrated management of pests and diseases of chilli and tomato grown by small‐scale farmers in selected districts of Sri Lanka

Contact Info

Product

Resources

About