The effects of exposing eggs of four cotton insect pests to volatiles of <i>Allium sativum</i> (Liliaceae)

Gurusubramanian, Guruswami; Krishna, S. S.

doi:10.1017/s0007485300052160

Cited by 47 publications

(23 citation statements)

References 10 publications

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“…The influence of egg age on pesticide susceptibility was also observed for triflumuron in T. urticae, but eggs between 48 and 72 h old were significantly more sensitive to triflumuron than other age classes (Sáenz-de-Cabezón et al 2002). One of the factors that may influence egg susceptibility to pesticides is the change in the permeability of the chorion and/or egg membrane structures during embryogenesis, which may affect the diffusion of the pesticide into the eggs (Gurusubramanian and Krishna 1996;Michaelides and Wright 1997).…”

Section: Discussionmentioning

confidence: 99%

Spiromesifen toxicity to the spider mite Tetranychus urticae and selectivity to the predator Neoseiulus californicus

et al. 2011

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Tetranychus urticae Koch (Acari: Tetranychidae) is a major pest of several agricultural crops and Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) is an important natural enemy of this pest mite. The objective of the study was to evaluate the effect of spiromesifen on the development and reproduction of T. urticae, and to assess the influence of spiromesifen and other acaricides on the population growth rates of the spider mite and its predator, N. californicus. Toxicity tests with spiromesifen at different life stages of T. urticae indicated that eggs less than 72 h old were more sensitive than other development stages. The oviposition rate of T. urticae was significantly affected by spiromesifen. Experiments on the effects of spiromesifen on the growth rates of T. urticae and N. californicus indicated that spiromesifen is innocuous to the predaceous mite but highly toxic to the spider mite, leading to population suppression in 10 days. Fenpropathrin, acephate and neem oil were not harmful to N. californicus, but were not so efficient as spiromesifen in controlling T. urticae, and had significantly less influence on the population growth rates of the spider mite. Among these three products, only neem oil caused significant reduction in the growth rate of T. urticae. Chlorfenapyr, abamectin, milbemectin and diafenthiuron significantly affected the population growth rates of T. urticae and N. californicus. Spiromesifen was the most promising acaricide for managing the twospotted spider mite, when used in combination with N. californicus.

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Section: Discussionmentioning

confidence: 99%

Spiromesifen toxicity to the spider mite Tetranychus urticae and selectivity to the predator Neoseiulus californicus

et al. 2011

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“…Rajendran and Sriranjini (2008) reported that the susceptibility of the eggs of stored-product insects varied depending on the species and the plant essential oil, which is in agreement with our findings. The differences in the egg vulnerability of tested insect species to essential oil vapors could be due to structural (thickness, shape, etc) differences in the chorion of insect species or to changes in the permeability of the chorion and/or vitelline membrane of insect species occurring during embryogenesis, which may facilitate the diffusion of vapors into the eggs so that vital physiological and biochemical processes are affected (Gurusubramanian and Krishna 1996). These factors have been considered to play an important role in the susceptibility of eggs of many insect species to different ovicides including organophosphates, carbamates and dinitrophenols (Michaelides and Wright 1997;Smith and Salkeld 1966).…”

Section: Discussionmentioning

confidence: 99%

Susceptibility of eggs of Tribolium confusum, Ephestia kuehniella and Plodia interpunctella to four essential oil vapors

2009

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Susceptibility of eggs of Tribolium confusum du Val. (Coleoptera: Tenebrionidae), Ephestia kuehniella (Zell.) (Lepidoptera: Phycitidae) and Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae) to vapors of essential oil from garlic (Allium sativum L.), birch (Betula lenta L.), cinnamon (Cinnamonum zeylanicum (Blume)) and aniseed (Pimpinella anisum L.) was studied. Preliminary bioassay tests indicated that vapors of the essential oils had a significant effect on the eggs of tested insect species when exposed to a concentration of 20µl l −1 air for 24 h. Generally, garlic and birch essential oils were more toxic to the eggs of tested insect species than cinnamon and aniseed essential oils (except for eggs of T. confusum). There was also a significant difference between susceptibility of eggs of T. confusum, E. kuehniella and P. interpunctella to tested essential oils. Toxicity data indicated that eggs of T. confusum were more susceptible to tested essential oils, with LC 90 values ranging from 3.11 to 33.49µl l −1 air, than those of E. kuehniella and P. interpunctella; eggs of P. interpunctella were the most tolerant to the essential oils, with LC 90 values ranging from 22.02 to 72.42µl l −1 air. Concentration × time (Ct) products of 0.29, 0.22, 0.13 and 1.37 mg h l −1 for garlic, birch, cinnamon and aniseed essential oil, respectively, were required to obtain 90% kill of T. confusum eggs. Although cinnamon essential oil had a much closer Ct product value to methyl bromide, garlic and birch essential oils were found to be the most promising ones since they had also high fumigant toxicity on eggs of both E. kuehniella and P. interpunctella.

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“…Consequently, to suppress leafhopper populations, the repellent should be combined with other pest management tactics, for example, with an attractive ingredient to build a push–pull system. This system is an effective means of pest behavioural manipulation and has been used successfully to manage several insect pests . A typical example is the combination of a neem seed extract spray (repellent) with an attractive trap crop to protect cotton crops from Helicoverpa armigera (Hübner) and Helicoverpa punctigera (Wallengren) in Australia .…”

Section: Discussionmentioning

confidence: 99%

Primary screening and application of repellent plant volatiles to control tea leafhopper, Empoasca onukii Matsuda

Cai

Luo

Meng

et al. 2019

Pest Management Science

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BACKGROUND The tea leafhopper, Empoasca onukii Matsuda (Hemiptera: Cicadellidae), is a major pest of tea plants in China. Here, we evaluated the repellent properties of eight volatile chemicals alone and in various combinations as tools for the management of this pest in tea gardens. These chemicals were from the Alliaceae and other aromatic plants, and are known to repel various insect species. RESULTS Among the eight volatile compounds, dimethyl disulfide (DMDS), 1,8‐cineole and allyl methyl sulfide were significantly repellent towards E. onukii adults. DMDS and 1,8‐cineole were mixed to formulate a binary repellent. Under field conditions, spraying and slow‐release applications of the mixture significantly decreased the density of E. onukii adults. The repelling effect after spraying was very short, only ∼ 2 days, but the slow‐release mixture had a longer term repelling effect on E. onukii adults. High emission of the slow‐release mixture, which was achieved by increasing the number of slow‐release bottles, had a stronger repellent effect than low emission. Moreover, when the amount emitted was sufficient, the slow‐release mixture significantly decreased the number of leafhopper nymphs in a treated tea‐plant line, and significantly decreased the number of leafhopper adults and nymphs in a tea‐plant line adjacent to the treated area. CONCLUSION This study demonstrates the repellent action of a mixture of DMDS and 1,8‐cineole applied by a slow‐release method against E. onukii in a tea plantation. This mixture has potential applications in integrated pest management schemes. © 2019 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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The effects of exposing eggs of four cotton insect pests to volatiles of Allium sativum (Liliaceae)

Cited by 47 publications

References 10 publications

Spiromesifen toxicity to the spider mite Tetranychus urticae and selectivity to the predator Neoseiulus californicus

Spiromesifen toxicity to the spider mite Tetranychus urticae and selectivity to the predator Neoseiulus californicus

Susceptibility of eggs of Tribolium confusum, Ephestia kuehniella and Plodia interpunctella to four essential oil vapors

Primary screening and application of repellent plant volatiles to control tea leafhopper, Empoasca onukii Matsuda

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