scholarly journals Predatory mite fauna associated with agri-horticultural crops and weeds from the Gangetic Plains ofWest Begal, India*

Zoosymposia ◽  
2011 ◽  
Vol 6 (1) ◽  
pp. 62-67 ◽  
Author(s):  
KRISHNA KARMAKAR ◽  
SALIL K. GUPTA

Astudy was conducted in 2008–2009 to explore the predatory mite fauna from different agri-horticultural crops and weeds in the Gangetic plains ofWest Bengal. A total of 31 species belonging to nine genera, seven families and two orders were identified; they are listed along with their prey, period of occurrence and the plant habitats in which they were recorded. The most frequently collected specieswere the phytoseiids Amblyseius largoensis (Muma) and Neoseiulus longispinosus (Evans), the stigmaeids Agistemus spp. and the anystidWalzia indiana Smith-Meyer&Ueckermann.Given the frequencywithwhich these mites were found, they can be considered potentially useful in suppressing the associated prey mites. The phytoseiids Paraphytoseius multidentatus Swirski & Schechter, Euseius ovalis (Evans), Euseius coccineae (Gupta), Neoseiulus fallacis (Garman) and the cheyletid Cheletogenes ornatus (Canestrini&Fanzago) were less frequently found and less abundant, implying that their impact on prey population is less important. The remaining species were rare.

2019 ◽  
Vol 112 (5) ◽  
pp. 2262-2267 ◽  
Author(s):  
Raja Zalinda Raja Jamil ◽  
Christine Vandervoort ◽  
John C Wise

Abstract Neoseiulus fallacis (Garman) is a predatory mite that is common in apple orchards and distributed throughout North America. However, N. fallacis may be susceptible to pesticides used for the management of crop pests. This study aimed to evaluate the temporal effects of commonly used insecticides on N. fallacis survival. Neoseiulus fallacis adults were exposed to field-aged residues, and mortality and lethal time were measured over 96 h of exposure. Carbaryl caused high mortality to N. fallacis and the shortest lethal time values (LT50), followed by spinetoram, with moderate lethal time values. Esfenvalerate, acetamiprid, chlorantraniliprole, and novaluron showed little to no lethality to N. fallacis following exposure to dry field-aged residues. The results of this study provide important field-relevant knowledge that is often void from laboratory-based studies, which can aid integrated pest management (IPM) decision-makers in apple production systems.


2001 ◽  
Vol 20 (3) ◽  
pp. 191-198 ◽  
Author(s):  
M Navajas ◽  
H Thistlewood ◽  
J Lagnel ◽  
D Marshall ◽  
A Tsagkarakou ◽  
...  

2017 ◽  
Vol 22 (9) ◽  
pp. 1316 ◽  
Author(s):  
Nguyen Duc Tung ◽  
LUONG THI HUYEN ◽  
DANG HUONG LAN ◽  
CAO VAN CHI ◽  
PATRICK DE CLERCQ ◽  
...  

Development time, survival, reproduction, and sex ratio were determined for the predatory mite Neoseiulus longispinosus (Evans) at six constant temperatures (20, 25, 27.5, 30, 32.5 and 35 oC) reared on citrus red spider mite Panonychus citri (McGregor). No predatory mite reached adulthood at 35oC. All female and male immature stages of N. longispinosus developed significantly faster as the temperature increased from 20to 30 oC, but development slowed down as the temperature exceeded 30 oC. The mean total developmental time of females was longest at 20 °C (9.73 days), followed by 25oC (5.67 days), 27.5oC (4.46 days), and 32.5 oC (4.55 days) and was shortest at 30oC (3.69 days). The oviposition rate and lifetime fecundity were highest at 27.5 oC (2.80 eggs/female/day and 43.76 eggs/female, respectively) and lowest at 20 oC (0.78 eggs/female/day and 21.64 eggs/female, respectively). However, temperature had no influence on the sex ratio of offspring with the proportion of females ranging from 0.62 to 0.65. The intrinsic rate of increase (r) of N. longispinosus averaged 0.323, 0.303, 0.267, 0.189 and 0.107 females female−1 day−1 at 30, 27.5, 32.5, 25, and 20°C, respectively. These values suggested that the most optimal temperatures for the population growth of N. longispinosus were between 27.5 and 30oC. 


2021 ◽  
Vol 18 (3) ◽  
pp. 207-215
Author(s):  
Nhyra Kamala Putri ◽  
◽  
Ali Nurmansyah ◽  
Sugeng Santoso ◽  
◽  
...  

Kanzawa spider mite, Tetranychus kanzawai Kishida (Tetranychidae) is one of the most important pest mite in Indonesia. This mite is known as the pest of many crops, including cassava. Neoseiulus longispinosus Evans (Phytoseiidae) is a predatory mite commonly found on plant infested by kanzawa spider mite. This predatory mite has high potential to be developed as biological control agent of T. kanzawai. The aim of this research is to elucidate the effective density and release time of N. longispinosus to control T. kanzawai on cassava. The research was conducted in the greenhouse, using cassava of Mentega cultivar. T. kanzawai were introduced into the cassava plants two weeks after planting, with density 5 female adults/plants. N. longispinosus were introduced 1, 2, and 3 weeks after T. kanzawai introduction with predator:prey ratio of 0:5, 1:5, 2:5, dan 3:5, respectively. Population of T. kanzawai and N. longispinosus, and also plant damage were observed at 6 weeks after planting. N. longispinosus could suppress T. kanzawai population and the highest suppression occurred at the interaction between 3:5 ratio and the release time at one week after T. kanzawai infestation. There was no significant effect of N. longispinosus release at various release ratio and time on attack intensity of T. kanzawai.


2012 ◽  
Vol 12 (125) ◽  
pp. 1-12 ◽  
Author(s):  
Vattakandy jasin Rahman ◽  
Azariah Babu ◽  
Amsalingam Roobakkumar ◽  
Kandasamy Perumalsamy

1962 ◽  
Vol 94 (1) ◽  
pp. 49-58 ◽  
Author(s):  
L. A. Lyons

Recent laboratory studies have shown that the type of spatial distribution of a host or prey population may affect the degree of natural control exerted by parasites and predators. For example, Burnett (1958) showed that the rate of paratisitism of the greenhouse whitefly, Trialeurodes vaporarium (Westw.), by Encarsia formosa Gahan, was considerably greater when the hosts were aggregated than when regularly distributed. In this case, searching parasites were better able to find groups of hosts than isolated ones. Similar results have been obtained by Huffaker (1958) in experiments with a predatory mite, Typhlodroms occidentalis Nesbitt, and a phytophagous mite, Eotetranychus sexmaculatus (Riley). Other important effects of aggregation are evident in the growing literature on this subject, as exemplified by the work of Long (1955), Mizuta (1960), and Morimoto (1960), who showed that the rate of development of some lepidopterous larvae in groups is greater than that of isolated larvae.


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