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THE BEHAVIOR OF SOME PLANT SPECIES TO ATTACK OF TWO-SPOTTED SPIDER MITE


CÄ‚LIN MARIA 1, TINA OANA CRISTEA 1, SILVICA AMBARUS 1, CREOLA BREZEANU 1, PETRE MARIAN BREZEANU 1, MARIA PRISECARU 2
1. Vegetable Research and Development Station Bacau, Calea Barladului, No. 220, Bacau, code: 600388, e-mail: sclbac@legumebac.ro
2. „Vasile Alecsandri”, University of Bacau, Faculty of Science, Department of Biology, Marasesti Street, no. 157, Bacau, Romania, e-mail: prisecaru_maria@yahoo.com

Issue:

SCSB, Number 1, Volume XXVI

Section:

Volume 26, No. 1

Abstract:

The two-spotted spider mite frequency attack in pepper ranges degree attack between 10.3 – 38.4%. The intensity of attack was higher in second decade of September - 30.9%. The degree of attack was between 0.5 and 17.5%. The frequency of two-spotted mite in melon was higher, ranging between 6.5 % and 78.6%. In the July, August and September the F% was the highest – 10.5 – 78.6%. The intensity of pest attack has grown up in second decade of June at 8.3% and it continued to grow until the third decade of September. The degree attack had the same upward dynamics: it began on the third decade of August and it was ranged between 11.3 and 61.3% The pest attack in climbing bean in open field began in first decade of June, frequency of attack being 0.1 %. From the first decade of July to third decade of September it had reached between 8.7 – 73.2 %. The intensity of the attack in climbing bean was also high in this period, ranging between 26.7 and 100%. The pest attack in tunnels of climbing bean was high and it began the third decade of June. The % of plants without symptoms of attack varied a lot. It can be seen that it begun in: the 1st decade of July at pepper; second decade of August at melon; second decade of July at climbing bean in open field and first decade of July at climbing bean. Starting from than, treatments are needed to control of two-spotted spider mite attack. The climbing bean in tunnel had the highest frequency, intensity and degree attack of pest. The % of climbing bean plants, without attack in open field and tunnels, has declined greatly since July, and it remained constant in August and September. Pepper and melon had the highest number of plants without pest attack.

Keywords:

behavior, plant species, pest attacks.

Code [ID]:

SCSB201701V26S01A0007 [0004658]

Note:

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