A glimpse of predatory mites in tea plantations of India: biodiversity, predatory potential and taxonomic key

2019 ◽  
Vol 43 (3) ◽  
pp. 351
Author(s):  
Salil Kumar Gupta ◽  
Somnath Roy
Keyword(s):  
Predatory Mites ◽  
Taxonomic Key ◽  
Tea Plantations ◽  
Predatory Potential

scholarly journals Predatory Capacity and Feeding Preference of Pesticide-Resistant Amblyseius deleoni Muma et Denmark (Mesostigmata: Phytoseiidae)

2021 ◽  
Vol 18 (24) ◽  
pp. 1441
Author(s):  
Bambang Heru Budianto ◽  
Rokhmani Rokhmani ◽  
Edi Basuki
Keyword(s):  
Copper Oxide ◽  
Feeding Preference ◽  
Predatory Mites ◽  
Continuous Exposure ◽  
Neem Seed ◽  
Wild Type ◽  
Tea Plantations ◽  
Synthetic Pesticides ◽  
Predatory Capacity ◽  
Seed Extracts

The population of the predatory mites Amblyseius deleoni had been decreasing due to continuous use of synthetic pesticides in tea plantations. Therefore, this study aimed to select pesticide-resistant individuals from a wild-type population of A. deleoni and to evaluate whether or not the resistant A. deleoni were still sensible as biological control agents.  We exposed A. deleoni to (propargite), fungicide (copper oxide) and a neem seed extracts. We found that the propargite-resistant predatory mites consumed larvae and nymphs of Tetranychus urticae more than the control (wild type) (P < 0.05).  There was no difference in the number of eggs and adults of T. urticae consumed (P > 0.05). The number of individuals of every stage of T. urticae consumed by copper-oxide resistant A. deleoni was the same (P > 0.05).  In general, there were no changes in food preference in the resistant predators to the 3 of pesticides (P > 0.05). There were slight differences on the pattern of predatory capacity among the resistant predators to the three pesticides.  Although the predators are resistant to the 3 pesticides, it took longer to consume their prey in comparison to the control.  These findings suggested that pesticide-resistant A. deleoni were able to maintain their functions as a biocontrol agent. HIGHLIGHTS The effectiveness of Amblyseius deleoni as a natural predators have decreased due to continuous uses of synthetic pesticides to control pests and diseases on tea plantations Continuous exposure to propargite, CuO and neem seed extracts induced the predatory mites deleoni to develop resistance No significant changes in feeding preference and the predatory capacity of the mite deleoni on T. urticae after becoming resistant to pesticides Exposures deleoni to pesticides may have induced heritable epigenetic changes permanently or just reversible phenotypes without changing the DNA sequence

Rediscovery and lectotypification of the Philippine endemic Hornstedtia microcheila Ridl. (Zingiberaceae) including an amendment to its description

2017 ◽  
Vol 11 (2) ◽  
Keyword(s):  
Endemic Species ◽  
The Philippines ◽  
Distribution Data ◽  
Taxonomic Key

Hornstedtia microcheila Ridl. (Zingiberaceae; Alpinioidieae; Alpinieae) is a poorly-known endemic species in the Philippines. It has not been collected again since its description in 1909. In 2017, however, the species was rediscovered in the Mt. Mandalagan Range, Patag, Silay City, Negros Occidental, after a lapse of over a century. A new, amended and extended description of H. microcheila based on this new collection is presented herein. Typification, colour photographs, distribution data, ecological details as well as a taxonomic key to the different Hornstedtia species in the Philippines are also provided.

What habitat does spiny snout mite occupy in Tasmania

2015 ◽  
Vol 68 ◽  
pp. 446-446
Author(s):  
D.J. Wilson ◽  
P.J. Gerard
Keyword(s):  
New Zealand ◽  
Sand Dune ◽  
Biocontrol Agent ◽  
Predatory Mites ◽  
Mite Species ◽  
Predatory Mite ◽  
Habitat Specificity ◽  
Nontarget Organisms ◽  
Flea Control ◽  
Potential Biocontrol Agent

Spiny snout mite (Neomolgus capillatus) is a potential biocontrol agent for clover flea (Sminthurus viridis) a white clover pest on dairy farms in warmer and wetter parts of New Zealand In the 1990s this mite was introduced from Brittany France into Tasmania for clover flea control Results during the release programme were highly promising and subsequent anecdotal farmer reports indicate widespread decreases in damage As N capillatus is a predatory mite and already known to attack nontarget organisms habitat specificity will determine whether it could be introduced into New Zealand without risk to native insects To assess this pastures on nine of the original Tasmanian release farms and adjacent nontarget habitats ranging from bush wetlands eucalypt stands to sand dune country were sampled in April 2014 Litter samples were collected heat extracted and mite species identified Neomolgus capillatus was found at effective densities in pastures that had good clover cover Where present it displaced Bdellodes spp mites that are ineffective against clover flea No N capillatus were found in the nontarget habitats all of which lacked clover and contained other predatory mites including Bdellodes spp Therefore the preference by N capillatus for lush pastures makes it an excellent prospect for introduction as a biocontrol agent into clover flea prone regions of New Zealand

Deer keds on wild ungulates in northern Italy, with a taxonomic key for the identification of Lipoptena spp. of Europe

2019 ◽  
Vol 34 (1) ◽  
pp. 74-85 ◽  
Author(s):  
M. Salvetti ◽  
A. Bianchi ◽  
M. Marangi ◽  
A. Barlaam ◽  
S. Giacomelli ◽  
...  
Keyword(s):  
Northern Italy ◽  
Wild Ungulates ◽  
Taxonomic Key

scholarly journals Relative potency of a novel acaricidal compound from Xenorhabdus, a bacterial genus mutualistically associated with entomopathogenic nematodes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Gamze Incedayi ◽  
Harun Cimen ◽  
Derya Ulug ◽  
Mustapha Touray ◽  
Edna Bode ◽  
...  
Keyword(s):  
Adult Female ◽  
Entomopathogenic Nematodes ◽  
Field Experiments ◽  
Petri Dish ◽  
Phytoseiulus Persimilis ◽  
Mortality Rates ◽  
Predatory Mites ◽  
The Novel ◽  
Compound Identification ◽  
Mutant Strains

AbstractOur study aimed to identify the novel acaricidal compound in Xenorhabdus szentirmaii and X. nematophila using the easyPACId approach (easy Promoter Activated Compound Identification). We determined the (1) effects of cell-free supernatant (CFS) obtained from mutant strains against T. urticae females, (2) CFS of the acaricidal bioactive strain of X. nematophila (pCEP_kan_XNC1_1711) against different biological stages of T. urticae, and females of predatory mites, Phytoseiulus persimilis and Neoseiulus californicus, (3) effects of the extracted acaricidal compound on different biological stages of T. urticae, and (4) cytotoxicity of the active substance. The results showed that xenocoumacin produced by X. nematophila was the bioactive acaricidal compound, whereas the acaricidal compound in X. szentirmaii was not determined. The CFS of X. nematophila (pCEP_kan_XNC1_1711) caused 100, 100, 97.3, and 98.1% mortality on larvae, protonymph, deutonymph and adult female of T. urticae at 7 dpa in petri dish experiments; and significantly reduced T. urticae population in pot experiments. However, the same CFS caused less than 36% mortality on the predatory mites at 7dpa. The mortality rates of extracted acaricidal compound (xenocoumacin) on the larva, protonymph, deutonymph and adult female of T. urticae were 100, 100, 97, 96% at 7 dpa. Cytotoxicity assay showed that IC50 value of xenocoumacin extract was 17.71 μg/ml after 48 h. The data of this study showed that xenocoumacin could potentially be used as bio-acaricide in the control of T. urticae; however, its efficacy in field experiments and its phytotoxicity need to be assessed in future.

Greater nitrous and nitric oxide emissions from the soil between rows than under the canopy in subtropical tea plantations

Geoderma ◽  
2021 ◽  
Vol 398 ◽  
pp. 115105
Author(s):  
Zhaoqiang Han ◽  
Jinyang Wang ◽  
Pinshang Xu ◽  
Zhirong Sun ◽  
Cheng Ji ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Tea Plantations ◽  
Nitric Oxide Emissions

Effects of botanical acaricides on Raoiella indica and Oligonychus sp. and their toxicity on two species of phytoseiid predatory mites

2021 ◽  
pp. 1-12
Author(s):  
Ángel Nexticapan-Garcéz ◽  
Marcos Cua-Basulto ◽  
Rodolfo Martín-Mex ◽  
Daisy Pérez-Brito ◽  
Alfonso Larqué-Saavedra ◽  
...  
Keyword(s):  
Predatory Mites ◽  
Raoiella Indica
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