Monitoring resistance of Phenacoccus solenopsis Tinsley (Homoptera: Pseudococcidae) to new chemical insecticides in Punjab, Pakistan

Saddiq, Bushra; Shad, Sarfraz Ali; Aslam, Muhammad; Ijaz, Mamuna; Abbas, Naeem

doi:10.1016/j.cropro.2015.03.026

Cited by 47 publications

(14 citation statements)

References 54 publications

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“…It entered China in 2009 (Wang et al ., , ; Wu and Zhang, ), and the latest report on the invasiveness of this pest was in Egypt in 2015 (Ibrahim et al ., ). The cotton mealybug is considered as an aggressive pest, and it has been the current important economic pest for researchers and entomologists because of its invasive, its resistance to new chemical insecticides, its widespread distribution with biological and morphological differences and the need for enhanced integrated pest control (Saddiq et al ., ; Brahmachari et al ., ). The adult stages of both sexes are completely different.…”

Section: Introductionmentioning

confidence: 99%

The functional difference of eight chitinase genes between male and female of the cotton mealybug, Phenacoccus solenopsis

Omar

et al. 2019

Insect Molecular Biology

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The cotton mealybug Phenacoccus solenopsis Tinsley (Hemiptera: Pseudococcidae) is a polyphagous insect that attacks tens of plant and causes substantial economic loss. Insect chitinases are required to remove the old cuticle to allow for continued growth and development. Though insect chitinases have been well studied in tens of insects, their functions in mealybug are still not addressed. Here, we sequenced the transcriptomes of adult males and females, from which eight chitinase genes were identified. We then used the method of rapid amplification of cDNA ends to amplify their full length. Phylogenetic analysis indicated that these genes clustered into five subgroups. Among which, group II PsCht2 had the longest transcript and was highly expressed at second instar nymph. PsCht10, PsCht3‐3 and PsIDGF were highly expressed in the adult females, whereas PsCht4 and PsCht4‐1 were significantly expressed at the male pupa and adult male. Next, we knocked down all eight chitinase genes by feeding the double‐stranded RNA. Knockdown of PsCht4 or PsCht4‐1 led to the failure of moult and, silencing PsCht5 resulted in pupation defect, while silencing PsCht10 led to small body size, suggesting these genes have essential roles in development and can be used as a potential target for pest control.

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Section: Introductionmentioning

confidence: 99%

The functional difference of eight chitinase genes between male and female of the cotton mealybug, Phenacoccus solenopsis

Omar

et al. 2019

Insect Molecular Biology

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“…Agricultural and forestry crop pests seriously threaten the quality and yield of agricultural production, causing huge economic losses (Hansen et al, 1999). Although chemical control is used for the direct elimination or extermination of agricultural and forestry crop pests, the use of pesticides on a large scale causes severe environmental pollution, endangers human health (Youn et al, 2003;Katsarou et al, 2005;Garratt and Kennedy, 2006), and results in the resistance of many pests (Puinean et al, 2010;Kavi et al, 2014;Bass et al, 2015;Saddiq et al, 2015). It is well-known that natural enemy insects are important biological agents in global agricultural ecosystems (Juen et al, 2012;Lu et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Different Dietary Sugars on the Development and Fecundity of Harmonia axyridis

Wang

Liu

et al. 2020

Front. Physiol.

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The aim of this study was to screen synergistic substances included in existing artificial feeds in order to improve the fertility and survival rate of Harmonia axyridis (Pallas) (Coleoptera: Coccinellidae), an efficient pest predator. To this end, we analyzed the potential effects of glucose and trehalose on the growth, development, and reproduction of H. axyridis and evaluated the effect of three different artificial feeds on the energy stress of H. axyridis. The artificial diets contained fresh pork liver, honey, sucrose, vitamin C, and royal jelly, which was marked it as Diet1. The glucose was added to diet1, which was marked it as diet2, while adding trehalose to diet1 was marked as diet3. The preoviposition period of H. axyridis on Diet 1 was slower than that of Diet 2 and Diet 3. Additionally, the spawning quantity and incubation rate of insects on Diet 2 and Diet 3 were significantly higher than that of those on Diet 1. Finally, the larval developmental time on Diet 1 was significantly slower than that of Diet 2 and Diet 3. These results indicate that the addition of an appropriate amount of glucose or trehalose may affect positively the growth, development, and reproduction of H. axyridis. In addition, further studies showed that ATP, amino acids and fatty acids content in the H. axyridis also increased after the addition of the synergistic substance. All these results show that proper adjustment of stored energy anabolic and catabolism is important to maintain the metabolic balance of the insect's entire life cycle and the addition of glucose or trehalose has a certain effect on the life indicators of H. axyridis.

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“…However, extensive application of insecticides may cause environmental pollution and insecticide resistance and can also negatively affect natural enemies [ 25 , 26 , 27 ]. Globally, several insect pest species have shown resistance to generally used insecticides [ 27 , 28 , 29 , 30 , 31 ] and both toxic and sublethal effects have been observed on non-target predators [ 32 , 33 , 34 ]. Thus, it is necessary to fully understand the negative effects of an insecticide on natural enemies when planning pest control measures within an IPM scheme.…”

Section: Introductionmentioning

confidence: 99%

Lethal and Sublethal Effects of Chlorpyrifos on Biological Traits and Feeding of the Aphidophagous Predator Harmonia axyridis

Rasheed

Khan

Hafeez

et al. 2020

Insects

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Except of pest control, insecticides have shown adverse effects on natural enemies as well. Thus, risk assessment of pesticides for biological control agents is critical for effective use in integrated pest management (IPM) schemes. In the present study, the lethal and sublethal effects of chlorpyrifos, a commonly used insecticide that may negatively affect biological control agents, were evaluated on a non-target predator, the Asian ladybeetle Harmonia axyridis. Previous studies have reported on lethal concentrations, but the effects of sublethal concentrations remain unclear. Lethal and sublethal concentrations of chlorpyrifos were applied to third instar larvae of H. axyridis, and different growth and developmental parameters were measured. Treatment with LC10 (4.62 mg a.i. L−1) significantly shortened the developmental period of third instar larvae, whereas it significantly prolonged those of fourth instar larvae and pupa. Treatment with LC30 (9.59 mg a.i. L−1) significantly increased the larval and pupal developmental period compared with that of the control, whereas feeding potential, female fecundity, and adult longevity significantly decreased after LC10 and LC30 treatment. The pre-oviposition period significantly increased compared with that of the control. Population growth parameters, the finite (λ) and intrinsic rate of increase (r) and the net reproductive rate (R0), decreased following exposure to sublethal concentrations of chlorpyrifos. According to the results, the use of chlorpyrifos in IPM schemes requires further research because even sublethal concentrations of this insecticide were harmful to H. axyridis population growth.

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Monitoring resistance of Phenacoccus solenopsis Tinsley (Homoptera: Pseudococcidae) to new chemical insecticides in Punjab, Pakistan

Cited by 47 publications

References 54 publications

The functional difference of eight chitinase genes between male and female of the cotton mealybug, Phenacoccus solenopsis

The functional difference of eight chitinase genes between male and female of the cotton mealybug, Phenacoccus solenopsis

The Effect of Different Dietary Sugars on the Development and Fecundity of Harmonia axyridis

Lethal and Sublethal Effects of Chlorpyrifos on Biological Traits and Feeding of the Aphidophagous Predator Harmonia axyridis

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