Management of Bemisia tabaci on vegetable crops using entomopathogens

Li, Yinping; Mbata, George N.; Simmons, Alvin M.; Shapiro-Ilan, David I.; Wu, Shaohui

doi:10.1016/j.cropro.2024.106638

Cited by 3 publications

(2 citation statements)

References 148 publications

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“…Studies have shown that whiteflies prefer cucurbits more than solanaceous plants [ 5 , 6 , 7 ]. Both adults and immatures feed on the sap, leading to chlorosis and necrosis spots, and honeydew excretion facilitates the growth of sooty mold [ 8 , 9 , 10 , 11 ]. Their feeding also causes silver leaf disorder and tarnished leaf appearance and fruit color, which reduce the crop’s marketability [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Their feeding also causes silver leaf disorder and tarnished leaf appearance and fruit color, which reduce the crop’s marketability [ 12 ]. Along with direct losses due to a reduction in nutritional values, MEAM1 can indirectly impair the host plants by transmitting pathogenic viruses [ 1 , 4 , 10 , 11 ]. This sap-sucking pest can transmit over 300 plant viruses; therefore, it is known as a supervector [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

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Susceptibility of Yellow Squash and Zucchini Cultivars to the Sweetpotato Whitefly, Bemisia tabaci Gennadius (MEAM1), in the Southeastern United States

Mbata,

Li,

Warsi

et al. 2024

Insects

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The sweetpotato whitefly, Bemisia tabaci (Gennadius) Middle East–Asia Minor 1 (MEAM1), causes significant losses to vegetable crops directly by sap-feeding, inducing plant physiological disorders, and elevating the build-up of sooty mold, and indirectly by transmitting plant viruses. In this study, we evaluated the susceptibility of 20 yellow squash and zucchini (Cucurbita pepo) cultivars to MEAM1, across three growing seasons in the southeastern United States. Weekly sampling of the numbers of MEAM1 adults, nymphs, and eggs were conducted from the fourth week after seed sowing and across 6 weeks during the summer and fall of 2021 and five weeks during the fall of 2022. In general, adult whitefly populations were high during the first week of sampling but decreased as the seasons progressed. The zucchini cultivar ‘Black Beauty’ harbored the most adults, while ‘Green Eclipse Zucchini’ was the least attractive zucchini cultivar to the adults in fall 2022. For yellow squash, ‘Early Summer’ (summer 2021) and ‘Amberpic 8455’ (summer 2021 and fall 2022) were the cultivars with the highest adult populations, while ‘Lioness’ (summer 2021) and ‘Gourmet Gold Hybrid’ (fall 2022) harbored the lowest adult counts. The whitefly egg counts across both vegetables trailed those of adults and peaked in the second week of sampling. The counts of nymphs increased as the seasons progressed, but there was a decline after the second week during fall 2021. For the yellow squash cultivars, ‘Gourmet Gold Hybrid’, (summer 2021 and fall 2022), ‘Lioness’, and ‘Fortune’ (summer 2021) recorded the highest yields. For zucchini, ‘Golden Glory’ (summer 2021) was the top performer. These results provide valuable information for whitefly management in yellow squash and zucchini based on host plant susceptibility and yield.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Susceptibility of Yellow Squash and Zucchini Cultivars to the Sweetpotato Whitefly, Bemisia tabaci Gennadius (MEAM1), in the Southeastern United States

Mbata,

Li,

Warsi

et al. 2024

Insects

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In Vitro Response of Two Strains of Cordyceps javanica to Six Chemical Pesticides

Mao,

Cai,

Wang

et al. 2024

JoF

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To determine the compatibility of two new biocontrol fungi with common chemical pesticides, this study examined the effects of three insecticides, namely, avermectin, imidacloprid, and acetamiprid, and three fungicides, namely, chlorogenonil, boscalid, and kasugamycin, on the mycelial growth and spore germination of Cordyceps javanica strains IF-1106 and IJ-tg19. The insecticidal effects of mixed insecticides or fungicides with good compatibility with C. javanica IJ-tg19 against Myzus persicae were tested. The results showed that the six chemical pesticides exerted different degrees of inhibition on the mycelial growth of both C. javanica strains, with an obvious dose-dependent effect. The inhibitory effect of chlorothalonil on the mycelial growth of IF-1106 and IJ-tg19 was greater than 75%. Different kinds and concentrations of chemical pesticides had significant effects on spore germination. Among them, acetamiprid had little inhibitory effect on C. javanica spores. Therefore, the two C. javanica strains exhibited good compatibility with the insecticide acetamiprid and had some compatibility with avermectin and imidacloprid. Among the fungicides, the compatibility of the two strains of biocontrol fungi was the best with kasugamycin, followed by boscalid, while their compatibility with chlorothalonil showed the least compatibility. The median lethal time (LT50) of five concentrations of C. javanica IJ-tg19 (1 × 103, 1 × 104, 1 × 105, 1 × 106, and 1 × 107 spore/mL) mixed with acetamiprid against M. persicae were 5.28, 4.56, 3.80, 2.73, and 2.13 days, respectively, and the insecticidal rate was higher than that of fungus treatment alone (5.19, 4.59, 4.05, 3.32, and 2.94 days, respectively) or chemical pesticide treatment (5.36 days). This study provides data support and a theoretical basis for reducing the use of chemical pesticides, improving the efficiency of C. javanica-based insecticides, and optimizing the synergistic use of fungi and chemical pesticides.

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Sustainable Production of Some Vegetable Species in the Tropical Highlands of Colombia, South America

Casierra-Posada,

Fischer

2024

Advances in Environmental Engineering and Green Technologies

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In the Colombian highlands, the use of native and/or improved varieties of vegetables, adapted to the elevation range and the adversities of climate change, are of great importance. To increase vegetable production, quality, and sustainability, new cultivation practices that are easy to implement have been proposed. These include enriching the spectrum of incident light in a given range, and the use of different substrates, which can be a more sustainable alternative to soil cultivation. The problem of heavy metal contamination in crops near rivers, industrial and mining sites, and roads must be solved through legal regulation, appropriate instructions to farmers, and the use of species and varieties that accumulate lower quantities of heavy metals. Also, in order to improve the sustainability of vegetable quality, work is being done on harvesting at the optimum degree of maturity, the use of suitable packaging, and the use of pesticides of natural origin.

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Management of Bemisia tabaci on vegetable crops using entomopathogens

Cited by 3 publications

References 148 publications

Susceptibility of Yellow Squash and Zucchini Cultivars to the Sweetpotato Whitefly, Bemisia tabaci Gennadius (MEAM1), in the Southeastern United States

Susceptibility of Yellow Squash and Zucchini Cultivars to the Sweetpotato Whitefly, Bemisia tabaci Gennadius (MEAM1), in the Southeastern United States

In Vitro Response of Two Strains of Cordyceps javanica to Six Chemical Pesticides

Sustainable Production of Some Vegetable Species in the Tropical Highlands of Colombia, South America

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