Eva L. Baideng

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THE EFFECT OF PLASTIC MULCHING, SOME BOTANICAL INSECTICIDES AND TRICHODERMA KONINGII ON TOMATO PLANT

Eva L. Baideng, Dantje T. Sembel, Max Tulung, Jootje Warouw

Abstract
    This study aims to determine the effect of the use of plastic mulch combined with some botanical insecticide extracts as well as the use of the fungus Trichoderma koningii on several variables observations, including (1) the percentage of diseased leaf by Liriomyza sativae, (2) symptoms and diseases that attack tomato plants. Research arranged in a randomized block design (RBD) which consists of six treatments and each treatment was repeated five times. The treatments are as follows: (A) Derris elliptica extracts + plastic mulch + T. Koningii; (B)Melia azedarach extracts+plastic mulch + T. Koningii; (C) Aglaia odorata extract + plastic mulch + T. Koningii; (D) Curacron only (without plastic mulch and T. Koningii); (E) Plastic mulch + T. Koningii without spray; (F) Control (without spray, plastic mulch and T. Koningii). Results indicated that the highest percentage of leaves infested by pests L. Sativae found in the control treatment (64.99%). The highest peak attacks by L. Sativae in nine weeks after planting and declined after the following weeks in all treatments. Analysis of variance results on the observation of the seventh or ninth week after planting showed that the treatments effect is very real to attack L. Sativae. The average percentage of attacks on treatments A, B and C are relatively low (24.89%, 27.38%, and 28.45% respectively), compared to treatments D, E and F (52.48%, 57.06%, and 64.99% respectively).

Key words: Trichoderma koningii, Liriomyza sativae, Plastic mulch