Whiteflies are tiny, winged insects that are major pests of various crops, including green gram. They belong to the family Aleyrodidae and are known for their white wings and bodies. Whiteflies weaken plants by sucking vital sap, hindering growth, development, and pod formation. Studies report yield losses ranging from 10% to 30% due to direct feeding alone. Whiteflies serve as vectors for numerous plant viruses, including the devastating Mungbean Yellow Mosaic Virus (MYMV). MYMV infection can cause stunting, yellowing, leaf distortion, and even complete crop failure, leading to potential yield losses of 50% to 100%.
- Type of Infestation: Pest
- Common Name: Whitefly
- Scientific Name: Bemisia tabaci
- Affected Parts Of the plant: Leaves
Identification:
- Adults are small, about 1-2 mm long, with white wings and bodies.
- They have four wings, which they hold roof-like over their bodies when resting.
- Nymphs are flat, scale-like, and translucent, often found on the undersides of leaves.
Environmental Favorable factors for pest/Disease:
- Temperature: Whiteflies, particularly the Bemisia tabaci complex, prefer warm temperatures, with 25-32°C being optimal for their development and activity. Hotter regions and periods align well with green gram growing seasons, potentially exacerbating whitefly issues.
- Humidity: While they adapt to a wide range (50-80%), moderate humidity levels seem most favorable for whitefly egg laying, nymph survival, and adult activity.
Symptoms of Pest:
- Yellowing and stunting: Due to sap loss and reduced photosynthesis.
- Sticky leaves: Presence of honeydew and sooty mold.
- Curled leaves: As a response to feeding damage.
- Presence of whiteflies: Adults are small (1-2 mm) white insects with white wings, while nymphs are yellowish-green and scale-like.
Measures to control Pest:
|
Products |
Technical Names |
Dosages |
| K - Acepro |
Acetamiprid 20 % SP |
apply 60 to 80 grams per acre |
| ASHWAMEDH |
Diafenthiuron 50 % WP |
250 g / acre |
