EVALUATION OF SOME CHEMICAL AND NON-CHEMICAL OPTIONS AGAINST THE INSECT PESTS OF GLADIOLUS

Abstract

The experiment was conducted at the apiary of Sher-e-Bangla Agricultural University (SAU), Dhaka during the period from January to June 2019 to study the efficacy of some non-chemical methods in comparison to conventional chemical pesticides against insect pests of gladiolus. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The treatments were: (1) Neem oil @ 3ml/L water, (2) Neem oil @ 3ml/L water + Trichogramma evanescense @ 0.5 gm/ 6 sq. m, (3) Neem seed kernel @ 200 gm/L water, (4) Neem seed kernel @ 200 gm/L water + Trichogramma evanescense @ 0.5 gm/L 6 sq. m, (5) Ripcord 10 EC @ 2.0 ml/L water, (6) Radial 20 EC @ 3.0 ml/L water and (7) Untreated. The highest number of plants (54.66) obtained in T (Neem oil @ 3ml/L water). The highest number of pest population derived in (T 1 7 ) Untreated control and and followed by remained at T (Radial 20 EC @3.0 ml/L water. The lowest pest population derived in T (Neem seed kernel @ 200 gm/L water + Trichogramma evanescense @ 0.5 gm/L) 6 sq. m at early, mid and late stage of gladiolus respectively. The best outcomes has been obtained from T 4 4 (Neem seed kernel @ 200 gm/L water + Trichogramma evanescense @ 0.5 gm/L) and lowest outcome came from untreated control.