Results 161 to 170 of about 1,833 (208)
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Review of the Defensive Chemistry of Coccinellids
Chemical Reviews, 1996Angela, Glisan King, Jerrold, Meinwald
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Effects of an invading coccinellid on native coccinellids in an agricultural landscape
Oecologia, 1996Seven native coccinellid species inhabited alfalfa, corn, and small grain fields in eastern South Dakota prior to invasion and establishment of Coccinella septempunctata L. Six species occurred in all crops, however, Adalia bipunctata (L.) occurred only in corn.
Norman, Elliott +2 more
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PREDATION OF APHIDS BY COCCINELLID LARVAE
The Canadian Entomologist, 1981AbstractWe studied first and fourth instar larvae of Coccinella trifasciata L., C. Californica Mannerheim, C. undecimpunctata L., and Cycloneda polita Casey searching for Acyrthosiphon pisum (Harris) on alfalfa seedlings and for A. dirhodum (Walker) on oat seedlings, in the laboratory.
B. D. Frazer +3 more
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Natural hybridization in the coccinellid genus chilocorus
Chromosoma, 1966A population of lady-bird beetles at the head of the Crowsnest River valley on the immediate east side of the Rocky Mountains has been sampled regularly over the years 1961 to 1964. The 389 individuals studied had chromosome numbers ranging from 2n = 14 (58%) to 2n = 20 (3%). The former is the diploid number of C.
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Sequential sampling for adult coccinellids in wheat
Entomologia Experimentalis et Applicata, 1997AbstractAdult aphidophagous coccinellids are important predators of cereal aphids in wheat in the Great Plains of the United States for which sampling methods are needed to facilitate improved management. An equation relating the mean number of adult coccinellids per m2 in a wheat field to its variance was obtained using Taylor's power law.
N. C. Elliot +3 more
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Tritrophic effects on survival and development in a Coccidophagous coccinellid.
Communications in agricultural and applied biological sciences, 2008Chilocorus nigritus is currently considered one of the most successful biological control agents of armoured scale insects. However, establishment of this beetle in crop pest situations has not always been successful and there are still gaps in our knowledge of its ecology and behaviour. The research involved an examination of tritrophic effects on the
Boothe, RA +3 more
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Plant structure and the searching efficiency of coccinellid larvae
Oecologia, 1984| 1. To determine the effect of plant structure on the searching efficiency of Coccinella septempunctata L. larvae, their functional response on pea and bean plants was compared. 2. The attack coefficient a was lower on pea than on bean plants. 3. This was not due to a difference in the coincidence of prey distribution and predator searching effort ...
M C, Carter, D, Sutherland, A F G, Dixon
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Coccinellids and the Modern Pest Management
BioScience, 1970With the advancing progress of plant production, the need for protection against pests, diseases, and weeds increases constantly. Mixed and scattered farming has affected the ecosystem relatively little; there have been constant pressures against the pest in the environment and protective measures have in consequence been of less importance.
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Coccinellids on Crops: Nature’s Gift for Farmers
2020Single crops become a centre for the attack from arthropod pests. Aphids, thrips, whiteflies, coccids and mites are pests, tiny sap-sucking arthropods having a high infestation rate, due to high intrinsic rates of increase and a very short generation time.
Ahmad Pervez +2 more
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Description de quelques Coccinellides nouvelles
Annales de la Société linnéenne de Lyon, 1872Mulsant Étienne Martial. Description de quelques Coccinellides nouvelles. In: Annales de la Société linnéenne de Lyon, tome 18, Année 1870-71. 1872. pp. 321-327.
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