My sarson is getting covered with small green-black insects on the tops. Want to know when spraying is justified.
How much yield loss does aphid attack cause in mustard and when is the spray threshold?
GGiriraj Singh6 महीने पहले · 250 व्यू
4 जवाब
🌾Farmer.in Krishi Teamविशेषज्ञ ✓6 महीने पहले
Mustard aphid is the most damaging pest of the crop and a severe attack at flowering and pod formation can cause heavy yield and oil-content loss if left unchecked. The general threshold is to spray when aphid colonies build up on a noticeable share of plants or about 10 to 15 percent of plants show colonies on the central twig, rather than at the first sighting. Use a recommended insecticide at the label dose, spray in the cooler part of the day to protect pollinators, and avoid spraying during peak bee activity. Confirm the exact threshold and product with your KVK as it varies locally.
MMahaveer Singh6 महीने पहले
I watch the central twigs. Once colonies start building on the top shoots I spray once and it usually controls them. Spraying too early is a waste.
RRamesh Chand Sharma6 महीने पहले
Sowing on time helped me dodge the worst of it, because my early-sown mustard had set most of its pods before the aphid peak hit in the warmer spell. The late-sown plots in our village always get hammered harder by aphids at flowering.
BBhoodev Singh6 महीने पहले
Spray in the late afternoon when the bees have gone, the mustard flowers are full of pollinators in the morning. I learned to give good coverage on the top shoots where the aphids cluster, and to add a sticker so the spray holds on the waxy plant. One well-timed spray then is better than three rushed ones.