Effectiveness of some controlled-release insecticides against larvae of Inopus rubriceps (Macquart) (Diptera: Stratiomyidae), a pest of Australian sugarcane

Samson, Peter R.; Harris, WJ

doi:10.1016/s0261-2194(97)00044-6

Crop Protection

1997

DOI: 10.1016/s0261-2194(97)00044-6

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Effectiveness of some controlled-release insecticides against larvae of Inopus rubriceps (Macquart) (Diptera: Stratiomyidae), a pest of Australian sugarcane

Peter R. Samson

WJ Harris

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Cited by 3 publications

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“…A number of insecticides were effective against larvae of I . rvbriceps in bioassays (Samson 1992). One strategy of insecticide use is to apply insecticides in the plant crop, to reduce numbers of larvae carried over from the previous cropping cycle.…”

mentioning

confidence: 99%

Movement of Larvae of Inopus rubriceps (Macquart) (Diptera: Stratiomyidae) Into Rows of Sugarcane

Samson

Harris

1995

Australian Journal of Entomology

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Larvae of sugarcane soldiei-fly, liiopirs rrrbriceps, began aggregating near sugarcane plants in trough5 within 1 week of planting. By 6 weeks. almost 80% of larvae were found within 13 cm of the plants and only 5mo \veIe found 25-50 crn distant.Sugarcane soldier fly. Inopus rubriceps (Macquart), is a pest of sugarcane in Australia (Hitchcock 1970). The soil-dwelling larvae feed on sugarcane roots, causing poor growth and failure of ratooning aftzr harvest. Damage is usually seen in crops that are older than second ratoon (Samson et ul. 1991). However, larvae are often present in low numbers in newly-planted crops that follow ploughout of infested sugarcane (unpublished data).A number of insecticides were effective against larvae of I . rvbriceps in bioassays (Samson 1992). One strategy of insecticide use is to apply insecticides in the plant crop, to reduce numbers of larvae carried over from the previous cropping cycle. This may delay build up of larvae in subsequent ratoon crops by reducing the initial breeding population. This strategy is presently being tested.Larvae of I. rvbriceps are aggregated along rows of established sugarcane (Robertson 1984;Samson and McLennan 1992) so insecticides should be applied most efficiently along the rows. However, larvae are presumably dispersed throughout fields when cane is first planted after fallowing and soil cultivation. We did not know how long it would take larvae to concentrate on the newly-plantedrows. An estimate of this time is necessary to determine the best time of insecticide application. Application soon after planting is desirable, as the planting drill is then fully open and plants will not have begun stooling out. However, insecticide applied too early may be lost before larvae are attracted to the rows.Densities of larvae in newly planted sugarcane fields are too low to measure larval attraction to rows. Therefore, we obtained the necessary information using larvae and sugarcane plants in troughs. The troughs measured 1 r n long x 20 cm wide x 15 cm deep, the length being chosen to approximate the commercial sugarcane row width of 1.4-1.5 m. Larvae were collected from sugarcane fields in November. Eighteen troughs were filled with red volcanic soil (krasnozem) and 60 larvae were added evenly along the length of each trough. Four cuttings (setts) of cane stalk, each containing a single bud, were planted beside the midline of each trough 1 week later. Soil was subsequently removed from the trough in eight segments of equal size (Fig. 1). Pairs of segments 1 50 38 25 13 o 1 3 25 38 50Distance from midline (cm) Fig. 1. Sampling desigi of troughs used to measure aggregation of larvae of lt7opus rubriceps. Soil was sampled in eight segments and the segments combiiied as indicated by similar shading; the central black box represents the position of the sugarcane setts.equidistant from the midline were combined and larvae extracted by wet-sieving. Three troughs were sampled at each of six times up to 6 weeks after planting. The first sampling at 0 weeks was carr...

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mentioning

confidence: 99%

Movement of Larvae of Inopus rubriceps (Macquart) (Diptera: Stratiomyidae) Into Rows of Sugarcane

Samson

Harris

1995

Australian Journal of Entomology

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Field response of sugarcane cultivars to sugarcane soldier fly, Inopus rubriceps (Macquart) (Diptera: Stratiomyidae)

Samson

2002

Australian Journal of Entomology

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Ten commercial sugarcane cultivars were planted in 10 replicate plots in each of three field trials in southern Queensland, to evaluate their response to the sugarcane soldier fly Inopus rubriceps. Trials were monitored for three harvests. Numbers of soldier fly larvae differed slightly between cultivars, but probably not enough to prevent the development of damaging populations. Weights of larvae were the same on all cultivars, suggesting that antibiosis was not involved. The effect of soldier fly on performance of cultivars in each trial was examined by regression of number of ratoon shoots and subsequent number and weight of mature stalks and crop yield on larval density during summer−autumn within each crop class. Where statistically significant relationships were detected in ratoons, each increase in soldier fly density of 100 m−2 was associated with a yield reduction of 1.2−6.4 tonnes cane ha−1, or 3−8% of the expected yield of uninfested plants. In most analyses, the slopes of regressions were the same for all cultivars, indicating no differential response to soldier fly infestation among the cultivars tested.

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Insecticidal Effect of Controlled Release Formulations of Etofenprox Based on Nano-bio Technique

Hwang¹,

Kim²,

Bang³

et al. 2011

Journal of the Faculty of Agriculture, Kyushu University

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Effectiveness of some controlled-release insecticides against larvae of Inopus rubriceps (Macquart) (Diptera: Stratiomyidae), a pest of Australian sugarcane

Cited by 3 publications

References 5 publications

Movement of Larvae of Inopus rubriceps (Macquart) (Diptera: Stratiomyidae) Into Rows of Sugarcane

Movement of Larvae of Inopus rubriceps (Macquart) (Diptera: Stratiomyidae) Into Rows of Sugarcane

Field response of sugarcane cultivars to sugarcane soldier fly, Inopus rubriceps (Macquart) (Diptera: Stratiomyidae)

Insecticidal Effect of Controlled Release Formulations of Etofenprox Based on Nano-bio Technique

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