The Effect of Spider Mite Populations on Yield and Quality of Cotton

Canerday, Don T.; Arant, F. S.

doi:10.1093/jee/57.4.553

Cited by 9 publications

(4 citation statements)

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“…Inoculative releases of T. turkestant in 1983 substantiated the premise that yield is a function of time of spider mite infestation initiation. In agreement with several other reports (Canerday & Arant 1964, Furr and Pfrimmer 1968, h4istric 1969, the earlier the infestation occurs, the greater the damage. However, infestation initiation is not necessarily proportional, or even related to, infestation rate.…”

Section: Infestation Rate (Dp)supporting

confidence: 92%

Spider Mite (Acari: Tetranychidae) Infestation Rate and Initiation: Effect on Cotton Yield

Wilson

Trichilo

Gonzalez

1991

Journal of Economic Entomology

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A 2-yr study was conducted to investigate the effect of spider mites, Tetranychw spp., on cotton (Cossyytum hfrsutum L.) in the West Central San Joaquin Valley of California. Results of each year were analyzed by spline (i,e,, segmented) regression. In 1982, following infestation of cotton at a550 degree-days (DD) > 12°C after planting, significant reduction in yield did not occur until a critical infestation rate (change in the proportion of infested leaves) reached 0.121/100 DD, after which, yields were dramatically reduced. Results of spline regression analysis suggest that cotton is initially tolerant of spider mites, but once the infestation rate exceeds the critical rate, tolerance breaks down rapidly. This critical rate is fundamental to the economic threshold for spider mites on cotton, which is suggested to be 0.8 proportion infested, P(I), leaves. Plots treated with an acaricide at 0.8 P(I), dlid not reach the critical infestation rate and did not experience economic loss. In 1983, yield reduction was significantly greater with early infestations than with late infestations. Combining the 1982 and 1983 data into a single regression analysis showed that the txitical infesttition rate increased with later infestation initiation. In a supplemental analysis, infestation rates were weighted as a function of relative spider mite species abundance and species-specific damage. Weighted infestation rates did not significantly improve or reduce the fit of the regression function. A benefit-cost analysis indicated that once the spider mite population rate of increase exceeds the critical infestation rate, yield suppression is dramatic and sufficient to warrant management intervention. KEY 'WORDS Arachnida, Goss ypium, infestation rates, spider mites SPIDER MITES, Tetranychus spp., can be a severe economic problem on cotton (Gossypium hirsutum JOURNAL OF ECONOMIC ENTOMOLOGY Vol. 84, no. 2 greatest amount of damage, T. pacificus a moderate amount, and T. urticae the least. Because

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Section: Infestation Rate (Dp)supporting

confidence: 92%

Spider Mite (Acari: Tetranychidae) Infestation Rate and Initiation: Effect on Cotton Yield

Wilson

Trichilo

Gonzalez

1991

Journal of Economic Entomology

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“…Many investigators have documented reduced yield resulting from spider mite damage to cotton (Canerday and Arant 1964;Furr and Pfrimmer 1968;Mistric 1969;Roussel et al 1951). The degree of yield loss in the susceptible Acala SJ-2 was a function of mite density.…”

Section: Yieldmentioning

confidence: 99%

The impact of cotton plant resistance on spider mites and their natural enemies

Trichilo¹,

Leigh²

1986

Hilg

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A spider mite-resistant and a spider mite-susceptible variety of cotton were planted in the field in a replicated design. An acaricide (dicofol) and an insecticide (acephate) were used to manipulate numbers of spider mites and their natural enemies. In general, numbers of spider mites remained low until just before midseason when 650°D air temperature had accumulated. At 650°D, mite numbers began to increase more sharply and reached significantly (P

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“…spider mite complex, Tetran ychus pacificus McGregor, Tetranychus turkestani Ugarov and Nikolski, and Tetranychus urticae Koch, ranks third nationwide, behind plant bugs and Heliothis spp., in yield reduction of cotton (Head 1985). Studies documenting yield reduction have shown that the timing of spider mite arrival in cotton fields strongly affects the ultimate yield (Canerday & Arant 1964, Furr & Pfrimmer 1968, Mistric 1969, Wilson 1986; the earlier the invasion, the lower the yield.…”

mentioning

confidence: 99%

Spider Mite (Acari: Tetranychidae) Infestation Foci: Cotton Yield Reduction

Wilson

Pickett

Leigh

et al. 1987

Environmental Entomology

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Artificially inoculated spider mite foci increase in size at an exponential rate. Productivity was greatest on plants farthest from the center of each focus. Timing of initial infestation was shown, both experimentally and through simulation, to affect ultimate yield of cotton: the earlier the initiation of infestation, the lower the yield. These results as well as those of other researchers indicate that the tolerance of cotton to mite infestations increases with crop maturity. KEY WORDS Tetrartychus spp., spider mites, cotton, infestation foci, yield SPIDER MITES, Tetranychus spp., are considered a major pest of cotton in California. Damage by the

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The Effect of Spider Mite Populations on Yield and Quality of Cotton

Cited by 9 publications

References 0 publications

Spider Mite (Acari: Tetranychidae) Infestation Rate and Initiation: Effect on Cotton Yield

Spider Mite (Acari: Tetranychidae) Infestation Rate and Initiation: Effect on Cotton Yield

The impact of cotton plant resistance on spider mites and their natural enemies

Spider Mite (Acari: Tetranychidae) Infestation Foci: Cotton Yield Reduction

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