The reduction of damages caused by pea moths (Laspeyresia spp.) by spraying the peas with NeemAzal T/S
2001
Metspalu, L. | Hiiesaar, K. | Kuusik, A. (Estonian Agricultural Univ., Tartu (Estonia). Inst. of Plant Protection)
We investigated the efficiency of NeemAzal T/S on the pea moth's Laspeyresia dorsana and L. nigricana in the field. The formula was diluted with water and tested by concentrations of 0.5 per cent. The pea was sprayed six times with weekly intervals. The spraying with NeemAzal T/S reduced the damage caused by caterpillars of the pea moths 2-3 times. In the control variant the occurrence-curve of the caterpillars of pea moths and the flying-curve of moths coincided, there is an about one-month shift in time, i.e. the maximum of flight happened in mid July whereas the number of damaged pods was greatest in August. In the year of trial, the level of damage caused by pea moths remained considerably low, the most damaged test (50 per cent) proved to be the one from the end of summer. In the variant treated with NeemAzal T/S the amount of damaged pods stayed on one and the same level during the whole trial period, not exceeding 18 per cent
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