By J. G. Rodriguez
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Extra resources for Recent Advances in Acarology
Ovaa in the amino acid analyses is gratefully acknowledged. Also the help of Mr. J. Oele and Mr. P. J. Bolding for the analyses of nitrogen, the determination of leaf sizes and color, and the maintenance of the whole experiment, is gratefully acknowledged. REFERENCES Delver, P. (1978). Fruitteelt 68,284-287, 324-327. Kuenen, D. J. (1946). Meded. Tuinb. Voorl. Dienst. 44,68 pp. Post, A. (1962). Dissertation, University of Leiden, 110 pp. Rodriguez, J. G. (1964). Acarologia,fasc. s. 1964, 324-337.
Mowery et al. (1975) provides an example. Field counts were used to initiate the model which then made one week forecasts. The model was corrected by new counts each week to eliminate the build up of cumulative errors and to reset the model after miticide applications. This procedure permitted the prediction of the timing of mite outbreaks and the likelihood of control by natural enemies although predicted absolute magnitudes were only approximately correct. This type of validation is clearly a much more liberal procedure; as biologists we might well desire more accuracy than this technique demands.
Gossipi was found to be very susceptible to most pesticides applied on cotton. The effect of 5 pyrethroid toxicants on A. 011%), followed by Rup 951, J. F. 4). Similarly, three organophosphorus compounds were found to be very toxic to the predator A. gossipi. ) (Fig. 5). Galecron is also toxic to adult A. 098%). The selective use of these toxicants is obtained by using the lowest dosages essential to produce satisfactory control of the target pests. Also, one must adjust the timing of these insecticidal treatments in cotton to minimize damage to phytoseiid populations.
Recent Advances in Acarology by J. G. Rodriguez