Annual economic losses of eggplant due to western flower thrips (Frankliniella occidentalis) infestations are considerable. F. occidentalis is difficult to control due to rapid proliferation rates and resistance to chemical insecticides. A more effective biological control strategy is urgently required. To assess the potential efficacy of M. anisopliae CQMa421 in the biological control of F. occidentalis on eggplant, we evaluated its virulence and insecticidal activity in the laboratory and field. The laboratory results indicated that the LT₅₀ of M. anisopliae CQMa421 against F. occidentalis at 2 × 10⁷ conidia/ml was 5.5 days. The results from the experimental field trial showed that a single spray of M. anisopliae CQMa421 reduced thrips by 50–70% compared to the control; this was significantly lower than for the chemical insecticide imidacloprid. However, the results from demonstration field trials where consecutive sprays were made indicated that M. anisopliae CQMa421 controlled the pests at a level equivalent to that obtained with a chemical insecticide. The findings clearly demonstrated the feasibility of using M. anisopliae CQMa421 as an alternative to chemical insecticides in the control of F. occidentalis under field conditions.

由于西部花蓟马（Frankliniella occidentalis）的侵扰，茄子每年的经济损失是巨大的。由于快速的增殖速度和对化学杀虫剂的抵抗力，西欧F. occidentalis难以控制。迫切需要更有效的生物控制策略。为了评估M. anisopliae CQMa421在茄子上的西花蓟马的生物防治中的潜在功效，我们在实验室和现场评估了其毒力和杀虫活性。实验室结果表明，LT ₅₀的绿僵菌CQMa421对西花蓟马以2×10 ⁷分生孢子/ ml为5.5天。从实验田间试验的结果表明，单喷射绿僵菌CQMa421由50-70％相比于对照降低蓟马; 这大大低于化学杀虫剂吡虫啉。然而，从示范田间试验，其中连续的喷雾剂作了指示的结果绿僵菌CQMa421控制害虫在水平等同于用化学杀虫剂而获得的。这些发现清楚地证明了在田间条件下，用猪油单胞菌CQMa421替代化学杀虫剂来控制西花蓟马的可行性。