Effects of Early-, Mid-, and Late-Season Infestations of Two-Spotted Spider Mites on the Yield of Cotton123

Furr, R. E.; Pfrimmer, T. R.

doi:10.1093/jee/61.5.1446

Cited by 16 publications

(7 citation statements)

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“…Trends of mite population increase are undoubtedly most critical early in the season before about 700°D have elapsed. Furr and Pfrimmer (1968) and Mistric (1969) reported that early mite infestations caused greater reductions in yield than did late infestations. Once mite numbers begin to explode, it is extremely difficult for natural enemies to regain effective control.…”

Section: Natural Enemies and Varietal Resistancementioning

confidence: 99%

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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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Section: Natural Enemies and Varietal Resistancementioning

confidence: 99%

“…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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“…Nonetheless, we may assume that the effect of T. ogmophallos on peanut yield might occur at any of the reproductive stages within peanut development. Conversely, such yield reductions were not observed for late-season infestations of T. urticae in cotton (Furr and Pfrimmer, 1968).…”

Section: Discussionmentioning

confidence: 77%

Impact of Tetranychus ogmophallos (Acari: Tetranychidae) on different phenological stages of peanuts

et al. 2017

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“…In general, the greater the rate of infestation, the greater the expected reduction in yield. Investigators have also demonstrated that time of spider mite infestation (i-e., initiation or establishment) is directly related to yield loss (Furr & Pfrimmer 1968, Mistric 1969. Regressing P(1) on a physiological time unit such as degree days (DD) > 12°C from planting, will produce a straight line, the slope of which is an estimate of infestation rate.…”

Section: L) In the San Joaquin Valley Of California Andmentioning

confidence: 99%

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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Effects of Early-, Mid-, and Late-Season Infestations of Two-Spotted Spider Mites on the Yield of Cotton123

Cited by 16 publications

References 0 publications

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

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

Impact of Tetranychus ogmophallos (Acari: Tetranychidae) on different phenological stages of peanuts

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

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