Tetranychus evansi, Baker & Pritchard, 1960

K, Marie Stephane Tixier, Douin, Martial, Rocio, Oliva, Gonzalez, Lucia, Pount, Benjamin & KreiterK, Serge, 2020, Distribution and biological features of Typhlodromus (Anthoseius) recki (Acari: Phytoseiidae) onTetranychus urticae, T. evansi (Acari: Tetranychidae) and Aculops lycopersici (Acari: Eriophyidae), Acarologia 60 (4), pp. 684-697 : 690-691

Tetranychus evansi on Solanum nigrum

The number of eggs laid by the three populations T of. (A.) recki , N. cucumeris and N. californicus was significantly different P (= 0.016) ( Table 2). The highest fecundity was observed for T. (A.) recki from D. stramonium L. (0.3 eggs / female/ day) and the lowest for bean leaf discs), of T. evansi (on S. nigrum leaf discs) and all stages of A. lycopersicum (on S. nigrum leaf discs).

nicus and N. cucumeris .

N. californicus (0.05 eggs / female/ day) ( Table 2). Significant differences were only observed at day 1 (P =0.01) ( Table 4, figure 3b), where the highest fecundity was observed T for. (A.)

recki from D. stramonium and N. cucumeris and the lowest for N. californicus . For all the species, the mean fecundity decreases through the time ( Table 4). The mean number T of.

evansi eggs consumed per day was significantly different P =(0.01). The highest values were observed for T. (A.) recki collected on D. stramonium , T. (A.) recki collected on S. lycopersicum and N. cucumeris , and the lowest for N. californicus ( Table 3). No significant difference was observed at each day ( Table 4). For all species, the daily consumption significantly decreased through the time ( Table 4). The cumulated number of eggs consumed during four days ranged from 6.4 ( N. californicus ) to 18.1 (T. [A] recki from D. stramonium ) ( Figure 3d ). These results, as in Escudero and Ferragut (2005), Moraes & McMurtry (1985) and Koller et al.

(2007), show the low mean fecundity of N. californicus when fed on T. evansi , even lower than the values obtained in these publications (0.79 eggs/ female/ day, 0.5 eggs/ female/ day and 0.56 eggs/female/day, respectively). The low mean fecundity observed N for. cucumeris and the three populations of T. (A.) recki are in accordance with the results obtained for eight Phytoseiidae species by Moraes and McMurtry (1985). For T. evansi egg consumption, data in literature are scarce. Moraes and McMurtry (1986) reported a lower mean consumption by Phytoseiulus persimilis Athias­Henriot (1.4 ­ 1.7 eggs/ female/day) than the one here obtained for N. cucumeris and T. (A.) recki (3.11 ­ 4.52 eggs/female/day).

Figures

Figure 3 Cumulated number of eggs laid through the timeT. by(A.) recki (D: collected onDatura stramonium, S: collected onSolanum lycopersicum, M: collected onMentha suaveolens), N. californicus andN. cucumeris when fed with (a)T. urticae, (b) T. evansi and (e)A. lycopersici. Number of prey eggs consumed byT. (A.) recki, N. californicusandN. cucumeris when fed with (c)T. urticaeand (d)T. evansi.