Impacts of spinosad and λ-cyhalothrin on spider communities in cabbage fields in south Texas

  title={Impacts of spinosad and $\lambda$-cyhalothrin on spider communities in cabbage fields in south Texas},
  author={T-X. Liu and Rose Wambui Irungu and David Allen Dean and Marvin K. Harris},
Spiders are a principal arthropod group that preys on numerous pests of vegetables and other crops. In this study, we determined the effects of the two most commonly used insecticides, spinosad and λ-cyhalothrin, on diversity of spiders on cabbage in south Texas. In two seasons (fall 2008 and spring 2009), we collected a total of 588 spiders belonging to 53 species in 11 families from spinosad and λ-cyhalothrin-treated cabbages and the untreated control plants. A great majority of spiders were… 

The role of spiders as predators of two lepidopteran Brassica pests

Three most commonly occurring spider families were found to be capable of feeding on larvae of the diamondback moth, Plutella xylostella, and cabbage cluster caterpillar, Crocidolomia pavonana (Fabricius), under laboratory conditions.

Spinosad application in an apple orchard affects both the abundance of the spider Araneus diadematus and its web construction behaviour

Overall, the application of spinosad (Success4®), representing a triple disturbance (mechanical, toxicological and alimentary), has a negative impact on the orb web spider A. diadematus and should thus be used with caution if growers want to promote the contribution of these spiders to natural biocontrol in their fields.

Effects of thiacloprid, tau-fluvalinate and lambda-cyhalothrin on overwintered pollen beetles (Brassicogethes aeneus (Fabricius)) and their offspring in oilseed rape

The results indicate that Mavrik, and especially Biscaya, are effective in controlling pollen beetles, reducing infestation pressure and thereby insecticide treatment frequency in following years.

Effects of different insecticide applications on population development of pollen beetle ( Meligethes aeneus (Fabricius)) on oilseed rape ( Brassica napus L.)

The objectives of the present study were to determine the effects of the systemic neonicotinoid Biscaya and the two contact pyrethroids Mavrik and Karate Zeon on population development of pollen beetle and the impact of the insecticide treatments on parasitism rates of pollen beetles larvae by Tersilochus heterocerus and Phradis spp.

Spinosad and spinetoram disrupt the structure and the abundance of ground-dwelling arthropod communities in herbaceous fields

The findings showed that spinosad and spinetoram may disrupt the structure and the abundance of surface-active arthropod fauna causing considerable changes in the ground-dwelling biodiversity of this ecosystem.



Can agrobiont spiders (Araneae) avoid a surface with pesticide residues?

Investigating the residual activity (repellency and toxicity) of selected pesticides on six principal species of spider occurring in an apple orchard concluded that spiders can recognise and avoid only fresh residues, although older residues might still be toxic to them.

Comparison of Different Sampling Methods and Effect of Pesticide Application on Spider Populations in Lime Orchards in South Florida

Comparison of three sampling methods revealed that the visual sampling method provided the highest number of spiders collected followed by the shake-cloth method and the DVAC suction method collected the least, but showed that the choice of sampling method depends on the species of interest.

Spiders (Araneae) in the biological and integrated pest management of apple in the Czech Republic

Abstract:  Two management systems, biological and integrated, were compared to control the major pest, codling moth (Cydia pomonella) in apple orchards. The aim of the study was to assess the effect

Effects of SpinTor (Spinosad) on Cabbage Looper (Lepidoptera: Noctuidae): Toxicity and Persistence of Leaf Residue on Cabbage Under Field and Laboratory Conditions

Results indicate that SpinTor caused mortality both through direct contact and ingestion, and a combination of contact and ingested provided greater toxicity to T. ni larvae than ingestion alone.

Nontarget impact of spinosad GF-120 bait sprays for control of the Mexican fruit fly (Diptera: Tephritidae) in Texas citrus.

Bait sprays containing the toxicant spinosad were applied to citrus groves in the Rio Grande Valley of Texas where Mexican fruit flies were detected in surveillance traps, finding no detectable effect on populations of specific indicator species of parasitoids, or on numbers of beneficial insects in general, in the treated groves.


The data from the current laboratory study suggest that encapsulated lambda-cyhalothrin may be effective for controlling the southern green stinkbug with little adverse effects on the predator P. maculiventris, but field experiments are needed to confirm this.

Field‐scale effects of farming practices on linyphiid spider populations in grass and cereals

The results are discussed with reference to the large‐scale spatial structure of linyphiid spider populations and the use of spatially dynamic models to predict metapopulation size as a function of patterns of crop management, land use and landscape structure.

Further development for testing the effects of pesticides on wolf spiders.

The aggression of the spiders proved to be a stress factor when the vessel was inhabited by more than one spider and caused higher mortality in individuals treated with pesticides and that the sensitivity of the animals was influenced by their age.

Spider Colonization of Agroecosystems: Mode and Source

Data indicate that spider immigration into agricultural systems is not dependent on a neighboring reservoir (natural habitat) and that bordering habitats can contribute spiders if these are physiognomically similar.