Root and crown rot Avoid soil saturation of water that exceeds 24 hours. If needed, use fungicides containing (Phytopthora species) mefenoxam/metalaxyl-M. Ensure good soil drainage, drain low spots in orchard. Practice planting new trees on small mounds, berms or ridges of 20-25 cms in height (which can drain well). Some plum rootstocks for grafting contain resistance to Phytopthora. Planting soil depth should be no deeper than nursery soil depth. Graft unions should be well above the soil level. Mulberry Fruit tree leaf roller Several species of parasitic Tachnid flies and Ichneumonid and Braconid Applications of natural insecticides (Archips argyrospila) wasps attack leaf rollers. Green lacewings, assassin bugs and some beetles containing Bacillus thuringiensis/BT or also provide control. provide some control. Fall webworm Hand removal and destruction of webbing nests in fall. Applications of insecticides containing (Hyphantria Bacillus thuringiensis/BT. cunea) Armored scales Most scales are controlled naturally by predators and parasites, except when Use dormant or summer mineral oil to (Quadraspidiotus these predators and parasites are reduced by dust, ants or persistent kill crawlers (larval stage). perniciosus, Aspidiotus insecticides. nerii) Sanitation: Remove heavily infested branches. Monitor for presence of scales and in the summer, crawlers. Mealy bugs (several Keep plants vigorous with proper water, nutrition and pruning. Use narrow-range mineral oils to provide species) some control. Manage ant populations that tend and protect mealy bugs. Systemic insecticides containing Sanitation: Remove and destroy heavily infested branches or perpetually imidacloprid , acetamiprid or thiacloprid infested trees. may be used for intensely infested trees or branches. Whiteflies (several Natural predators and parasites generally keep whitefly populations low Most whiteflies are resistant to most species) unless they are sprayed with a broad spectrum persistent insecticide, have lots insecticides, so use is of limited of dust or ants. usefulness. Aluminum foil or reflective silver plastic mulches can repel whiteflies. Oils including neem oil provide some control. Use yellow sticky traps (sticky side toward tree and away from sunlight) to reduce whitefly populations.
Root and crown rot (Phytopthora species) Avoid soil saturation of water that exceeds 24 hours. Ensure good soil drainage, drain low spots in orchard. Practice planting new trees on small mounds, berms or ridges of 20-25 cms in height (which can drain well). Some plum rootstocks for grafting contain resistance to Phytopthora. Planting soil depth should be no deeper than nursery soil depth. Graft unions should be well above the soil level. If needed, use fungicides containing mefenoxam/metalaxyl-M. Mulberry Fruit tree leaf roller (Archips argyrospila) Several species of parasitic Tachnid flies and Ichneumonid and Braconid wasps attack leaf rollers. Green lacewings, assassin bugs and some beetles also provide control. Applications of natural insecticides containing Bacillus thuringiensis/BT or provide some control. Fall webworm (Hyphantria cunea) Hand removal and destruction of webbing nests in fall. Applications of insecticides containing Bacillus thuringiensis/BT. Armored scales (Quadraspidiotus perniciosus, Aspidiotus nerii) Most scales are controlled naturally by predators and parasites, except when these predators and parasites are reduced by dust, ants or persistent insecticides. Sanitation: Remove heavily infested branches. Monitor for presence of scales and in the summer, crawlers. Use dormant or summer mineral oil to kill crawlers (larval stage). Mealy bugs (several species) Keep plants vigorous with proper water, nutrition and pruning. Manage ant populations that tend and protect mealy bugs. Sanitation: Remove and destroy heavily infested branches or perpetually infested trees. Use narrow-range mineral oils to provide some control. Systemic insecticides containing imidacloprid , acetamiprid or thiacloprid may be used for intensely infested trees or branches. Whiteflies (several species) Natural predators and parasites generally keep whitefly populations low unless they are sprayed with a broad spectrum persistent insecticide, have lots of dust or ants. Aluminum foil or reflective silver plastic mulches can repel whiteflies. Use yellow sticky traps (sticky side toward tree and away from sunlight) to reduce whitefly populations. Most whiteflies are resistant to most insecticides, so use is of limited usefulness. Oils including neem oil provide some control.
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