Avoid planting in May-June when the incidence is generally high. If stem fly adults are observed on the plants immediately after germination, spray PNSPE (40 g/l) or Neem soap/ pongamia soap (10 g/l) at 7, 10 and 15 days after sowing. Otherwise give only two sprays at 10 and 15 days after sowing. If there is any good rain fall during this period then these botanicals will be washed off. Hence, spray Quinalphos 25 EC (1.5 ml/l) for the management of stem fly in beans at 10 and 15 days after sowing.
 Monitor the plants for stem fly adult activities, puncture marks and petiole mining soon after germination As soon as a few adults of stem fly(small housefly like insects) are noticed hovering over the crop, spray endosulfan 35 EC @ 2ml/l or acephate 75 WP @ 0.75 g/l or Neem seed powder extract (4% ) or neem soap (1%) or neem formulation with 10000 ppm azadirachtin (2 ml/l). However, please note that the botanicals get washed away by rain and they will be ineffective if it rains within 1-2 days of spray.

 Second spraying is given when on an average 5 leaves/10 leaves have petiole mining symptoms or at 15 days after sowing. This will also take care of leaf miner. For leaf miner, donot repeat sprays again and again, as it will increase pest population. 

 For thrips spray dimethoate ( 2ml/l) or lamda cyhalothrin (1 ml/l), 
Spray PNSPE (4%) or neem/ pongamia soap ( 8-10g/l) after flowering, if required give sprays at 10 days interval

 For mites spray acaricide like dicofol (1.5 ml/l) or wetable sulphur (2.5 gm/l) mixed with neem soap (0.75%) or pongamia soap (0.75%). Spray underside of the leaves thoroughly

This pest is serious during North East monsoon period. Hence, during this period sprays of PNSPE (40 g/l) or Neem soap (10 g/l) at 7-10 days interval according to pest infestation.