Components of Resistance in Leucaena collinsii (Leguminosae) to Heteropsylla cubana (Homoptera: Psyllidae)

1993 ◽  
Vol 22 (2) ◽  
pp. 319-325 ◽  
Author(s):  
Eraneo B. Lapis ◽  
John H. Borden
Keyword(s):  
Heteropsylla Cubana ◽  
Components Of Resistance

Mimosine content in the sap of leucaena species resistant and susceptible to Heteropsylla cubana Crawford

1991 ◽  
Vol 33 (1-2) ◽  
pp. 79-83 ◽  
Author(s):  
A. Irawan Sutikno ◽  
J. Darma ◽  
H. Prasetyo ◽  
Balai Penelitian Ternak
Keyword(s):  
Heteropsylla Cubana ◽  
Leucaena Species

The behavioural responses of three different strains of Musca domestica (Diptera: Muscidae) to Alfacron bait in the laboratory

1992 ◽  
Vol 82 (4) ◽  
pp. 471-478 ◽  
Author(s):  
Z.A. Freeman ◽  
D.B Pinniger
Keyword(s):  
Musca Domestica ◽  
Resistant Strain ◽  
Behavioural Responses ◽  
Components Of Resistance ◽  
Minute Period ◽  
Proboscis Extension ◽  
Number Of Visits ◽  
Time Spent Feeding ◽  
Different Strains ◽  
Cage Test

AbstractA study was carried out to investigate the behavioural components of resistance in the Standlake strain of Musca domestica Linnaeus. The flies were collected from a poultry unit where azamethiphos spray-on-bait (Alfacron), had been regularly used to control the fly population. A no-choice laboratory cage test was used to observe the responses of the Standlake resistant strain to baits and compare it with two other strains namely, Sparsholt resistant and Cooper susceptible. The baits used were, Alfacron, sugar and analytical grade azamethiphos, sugar alone, and a blank target as control. Only female flies were used, each strain was exposed separately to each bait over a 50 minute period and the responses were recorded with a datalogger. The responses (per fly) recorded during each test period were: the number of visits to a bait; the time spent on a bait; the number of feeds and time spent feeding on the bait defined as the number of proboscis contacts and the length of time of proboscis contact with the bait. Knockdown of flies was recorded at the end of each test. All strains showed differences in their responses to baits. The Standlake strain showed the greatest difference to responses to Alfacron, with inhibition of proboscis extension when flies landed on the bait and a lower proboscis contact when extended, resulting in fewer flies being knocked down by Alfacron than by the sugar and azamethiphos bait. This suggested that inhibition of feeding on the Alfacron bait by the Standlake strain was caused by formulation components or contaminants and not the active insecticide ingredient, azamethiphos.

scholarly journals Effect of Temperature and Hose Genotype on Components of Resistance to Groundnut Rust

2011 ◽  
Vol 1 (2) ◽  
Author(s):  
P Subrahmanyam ◽  
PV Subba Rao ◽  
PM Reddy ◽  
D McDonald
Keyword(s):  
Effect Of Temperature ◽  
Components Of Resistance ◽  
Groundnut Rust

Tamarixia leucaenae sp. n. (Hymenoptera: Eulophidae) parasitic on the leucaena psyllid Heteropsylla cubana Crawford (Hemiptera) in Trinidad

1988 ◽  
Vol 78 (3) ◽  
pp. 545-547 ◽  
Author(s):  
Z. Bouček
Keyword(s):  
Leucaena Leucocephala ◽  
Heteropsylla Cubana ◽  
Shade Tree ◽  
The Tropics

AbstractTamarixia leucaenae sp. n. is described from Trinidad as a parasitoid of Heteropsylla cubana Crawford. The psyllid is a serious pest of Leucaena leucocephala, which is used as a shade tree in plantations of various crops in the tropics.

scholarly journals Components of resistance to the sorghum head bug, Calocoris angustatus

2000 ◽  
Vol 19 (6) ◽  
pp. 385-392 ◽  
Author(s):  
A.P. Padma Kumari ◽  
H.C. Sharma ◽  
D.R.R. Reddy
Keyword(s):  
Calocoris Angustatus ◽  
Components Of Resistance

scholarly journals Evaluation of design methods for side resistance only rock socketed piles

2021 ◽  
Author(s):  
Ian Johnston
Keyword(s):  
Design Methods ◽  
Full Scale ◽  
The Other ◽  
Total Resistance ◽  
The Third ◽  
Components Of Resistance ◽  
Side Resistance

The ability of three methods to predict the load-settlement response of rock socketed piles was examined in a recent paper. The piles considered were complete piles in which both the side and base of the piles contribute to the total resistance. For a range of reasons, it is sometimes necessary to consider rock socketed piles for which the resistance is provided only by the side of the socket. This paper extends the earlier paper by comparing predictions for side resistance only piles with the load-settlement response of a suite of full-scale side resistance only pile tests. Only two of the methods of the earlier paper are used for this comparison as the third method could not decouple the two components of resistance. It is demonstrated that one of the methods produces reasonable predictions of performance whereas the other appears to underpredict performance.

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