Use of grazing animals to control insect pests of pasture

East, Robert A.; Pottinger, R. P.

doi:10.1080/00779962.1983.9722423

Cited by 23 publications

(16 citation statements)

References 22 publications

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“…The majority of pasture insects in New Zealand are soil dwelling pests (East & Pottinger 1983). In the central North Island, the only large soil dwelling predators are wireworms and these occur at densities of < 3/m2.…”

Section: Predatorsmentioning

confidence: 99%

Observations on Argentine stem weevil mortalities in Volcanic Plateau pastures

Prestidge

Barker

Pottinger

1987

New Zealand Entomologist

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Recent research at Ruakura has shown that the negative correlation betweenArgentine stem weevil (Lirtronotu bonariasis (Kuschel)) population survival (egg to adult) and egg density was density dependent. Density dependent mortalities could arise from pathogens, predators, parasitoids, larval combat and chemical releases by larvae andlor by the host plant. Large mortalities arising from pathogens, parasitoids, soil invertebrate predators and possibly Carabidae and Staphylinidae predators can be discounted in populations at Wairakei in the central North Island.Even without knowing the causative agent of the population mortality, any considerations for releases of natural enemies for biologcal control of stem weevil should act to augment this existing control. It is recommended that parasitoids be evaluated for release against late larval instar, pupae and adults.

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Section: Predatorsmentioning

confidence: 99%

Observations on Argentine stem weevil mortalities in Volcanic Plateau pastures

Prestidge

Barker

Pottinger

1987

New Zealand Entomologist

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“…Despite high grazing pressures in some stocking treatments (those with low residual herbage, Table 1), stock numbers were also low when compared with the grass grub response scale of 5 -~25 SU in Fig. 1 of East & Pottinger (1983).…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the use of stock animals for insect control (reviewed by East Received 25 March 1985;revision 30 May 1985& Pottinger 1983Roberts 1984) has been exploited in such examples as intensive stocking to reduce the densities of grass grub Costelytra zealandica (White) (Coleoptera: Scarabaeidae), porina Wiseana spp. (Lepidoptera: Hepialidae), Australian soldier fly Inopus rubriceps (Macquart) (Diptera: Stratiomyidae), and bluegreen lucerne aphid Acyrthosiphon kondoi Shinji (Hemiptera: Aphididae) (e.g., Green 1920;French 1973;Dixon & Campbell 1978;East 1979;Penman et al 1979;Holmes 1981;French & Savage 1985).…”

Section: Introductionmentioning

confidence: 99%

Effects of sheep stocking rates and management on the abundance of a pasture-feeding caterpillar

White

1985

New Zealand Journal of Experimental Agriculture

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Merino hogget stocking rates and management (continuous stocking, 2-rotation, and 6-rotation) are shown to interact with the abundance of a pasture-feeding insect Metacrias huttoni (Butler) (Lepidoptera: Arctiidae) in a predictable manner. The 6-year study of 9 grazing treatments demonstrates progressive variations in insect abundance over local space and over time. A multivariate estimator, S, of spatio-abundance is derived over the full range of treatments.

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“…Some faunal groups are favored by moderate levels of grazing (East and Pottinger, 1983;Seastedt et aI., 1988), but heavy grazing depresses population densities of most hemiedaphic groups (King and Hutchinson, 1976;Huthinson and King, 1980b).…”

Section: Pasture Managementmentioning

confidence: 98%