Cereal Aphid Capture in Yellow Baffle Trays1

1962 ◽  
Vol 55 (3) ◽  
pp. 407-408 ◽  
Author(s):  
B. F. Coon ◽  
H. B. Rinick
Keyword(s):  
Cereal Aphid

EFFECT OF NITROGEN FERTILIZER DOSE AND ROW SPACING ON AMARANTH PRODUCTIVITY

2019 ◽  
Keyword(s):  
Animal Husbandry ◽  
Dry Weight ◽  
Nitrogen Fertilizers ◽  
Row Spacing ◽  
Cereal Aphid ◽  
Perennial Weeds ◽  
Food And Feed ◽  
Leaf Surface Area ◽  
Cultivation Technology ◽  
Photosynthetic Potential

Amaranth is a valuable food and feed crop that can solve the problem of vegetable protein in animal husbandry. The aim of the research was to study elements of amaranth cultivation technology: the dose of nitrogen fertilizers (without fertilizers, N15, N20, N25) and the row spacing (15, 30, 45 cm). The work was carried out on sod-podzolic medium loamy gleyic soil on the experimental field of FSBEI HE Yaroslavl State Agricultural Academy in 2018. The studied parameters were determined according to generally ac-cepted methods. The use of nitrogen fertilizers contributed to a significant increase in leaf area and pho-tosynthetic potential of amaranth crops at the highest values of the background N20 – 4.7 thousand m2 / ha and 324.08 thousand m2 / ha × days, respectively. Increase in row spacing when sowing amaranth raised the leaf surface area value, accumulation of dry aboveground mass, photosynthetic potential, ger-mination and safety at maximum values in the variant with a row spacing of 45 cm. abundance of weed flea, cereal aphid and sunflower fire. Sowing amaranth with a width of 45 cm between rows caused a sta-tistically significant decrease in the number of studied pests, as well as the number and dry weight of young and perennial weeds. The use of nitrogen fertilizers in a dose of 25 kg AI / ha contributed to a sig-nificant decrease in the yield of amaranth green mass from 145.12 q / ha on the «no-fertilizer» variant to 127.93 q / ha, with maximum values for the background N20 – 156, 55 kg / ha. Thus, the greatest effi- 128 ciency was shown by the introduction of nitrogen fertilizers at a dose of 20 kg ai / ha when sown with a row spacing of 45 cm.

Diversity of cereal aphid parasitoids in simple and complex landscapes

2008 ◽  
Vol 126 (3-4) ◽  
pp. 289-292 ◽  
Author(s):  
Ines M.G. Vollhardt ◽  
Teja Tscharntke ◽  
Felix L. Wäckers ◽  
Felix J.J.A. Bianchi ◽  
Carsten Thies
Keyword(s):  
Cereal Aphid ◽  
Aphid Parasitoids ◽  
Complex Landscapes

scholarly journals Genetic structure and clonal diversity of an introduced pest in Chile, the cereal aphid Sitobion avenae

Heredity ◽  
2005 ◽  
Vol 95 (1) ◽  
pp. 24-33 ◽  
Author(s):  
C C Figueroa ◽  
J-C Simon ◽  
J-F Le Gallic ◽  
N Prunier-Leterme ◽  
L M Briones ◽  
...  
Keyword(s):  
Genetic Structure ◽  
Clonal Diversity ◽  
Sitobion Avenae ◽  
Cereal Aphid ◽  
Introduced Pest

Trophic interactions between three species of cereal aphid (Hemiptera: Aphididae) and spring wheat (Poaceae): implications for pest management

2007 ◽  
Vol 139 (6) ◽  
pp. 850-863 ◽  
Author(s):  
Samuel M. Migui ◽  
Robert J. Lamb
Keyword(s):  
Spring Wheat ◽  
Trophic Interactions ◽  
Plant Biomass ◽  
Rhopalosiphum Padi ◽  
Aphid Species ◽  
Economic Damage ◽  
Cereal Aphids ◽  
Cereal Aphid ◽  
Economic Thresholds ◽  
Specific Impact

AbstractThe susceptibilities of genetically diverse Canadian spring wheats, Triticum aestivum L. and Triticum durum Desf., to three aphid species, Rhopalosiphum padi (L.), Sitobion avenae (Fabricius), and Schizaphis graminum (Rondani), were investigated. Trophic interactions measured as changes in biomass of aphids and wheat plants were used to quantify levels of resistance, components of resistance, and impact of aphids on yield. Plants in field cages were infested with small numbers of aphids for 21 days at heading. These plants were usually more suitable for the development of S. avenae and S. graminum than of R. padi. Partial resistance, measured as seed production by infested plants as a proportion of that by a control, varied from 11% to 59% for different aphid species and wheat classes when all wheat plants were infested at the same stage. Cultivars within wheat classes responded similarly to each of the aphid species. None of the wheat cultivars showed agriculturally effective levels of antibiosis. The specific impact of each aphid species and wheat class varied from 5 to 15 mg of plant biomass lost for each milligram of biomass gained by the aphids. Canadian Western Red Spring wheat had a lower specific impact and therefore was more tolerant to aphids than the other two classes, but not tolerant enough to avoid economic damage at the aphid densities observed. Plants did not compensate for feeding damage after aphid feeding ceased, based on the higher specific impacts observed for mature plants than for plants that were heading. The interactions between aphids and plants show that current economic thresholds probably underestimate the damage caused by cereal aphids to Canadian spring wheat.

scholarly journals Length of prematurity period in wheat cultivars determines maximum cereal aphid abundance

2016 ◽  
Vol 52 (No. 4) ◽  
pp. 254-261
Author(s):  
Trávníčková Martina ◽  
Pánková Kateřina ◽  
Martinková Zdenka ◽  
Honěk Alois
Keyword(s):  
Spring Wheat ◽  
Annual Variation ◽  
Vegetation Period ◽  
Aphid Resistance ◽  
Wheat Cultivars ◽  
Cereal Aphid ◽  
Genetic Disposition ◽  
Population Peak ◽  
Early Ripening ◽  
Aphid Abundance

Maximum aphid numbers on wheat are positively related to the length of the period elapsed from immigration to the population peak. We predicted that maximum abundances on late maturing cultivars would be greater than on early ones. This was tested using 8 spring wheat cultivars that differed in the length of time to senescence. In a 4-year experiment, numbers of aphids were checked at weekly intervals. Maximum abundances on late-maturing cultivars were significantly greater than those on early cultivars. However, the length of the vegetation period affected maximum abundances less than did the annual variation in aphid abundance. Genetic disposition for early ripening thus tends to decrease aphid numbers, but manipulation of this character is unlikely to become an important source of aphid resistance.

scholarly journals Aphid Honeydew Enhances Parasitoid Longevity to the Same Extent as a High-Quality Floral Resource: Implications for Conservation Biological Control of the Wheat Stem Sawfly (Hymenoptera: Cephidae)

2020 ◽  
Vol 113 (4) ◽  
pp. 2022-2025
Author(s):  
Tatyana A Rand ◽  
Debra K Waters
Keyword(s):  
Biological Control ◽  
Cover Crop ◽  
Habitat Management ◽  
Biological Control Agent ◽  
Parasitoid Wasp ◽  
Floral Resources ◽  
Cereal Aphid ◽  
Crop Species ◽  
Wheat Stem Sawfly ◽  
Aphid Honeydew

Abstract Providing sugar resources for parasitoids is an important component of habitat management approaches to bolster biological control. We screened three flowering cover crop species, and one aphid species, for their potential to increase the longevity of the parasitoid wasp, Bracon cephi (Gahan) (Hymenoptera: Braconidae), an important biological control agent of the wheat stem sawfly, Cephus cinctus Norton (Hymenoptera: Cephidae). We found that buckwheat and honeydew from the cereal aphid, Rhopalosiphum padi (Linnaeus) (Hemiptera: Aphididae), increased longevity of B. cephi females by over threefold, while longevity on sunflower and coriander was not significantly different from controls on wheat. The results suggest that incorporating buckwheat into cover crop mixes could enhance parasitoid performance. However, the finding that honeydew associated with a common aphid in wheat provides a suitable resource suggests that a better understanding of the varying quality, and spatial and temporal availability, of aphid honeydew will be a critical consideration in evaluating the potential benefits of managing floral resources for parasitoid conservation in this system.

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