AmericanHort Community Connector Roundtable: Managing Pests, Diseases & Weeds

HyFood takes habanero to another level with biological control

we have acquired knowledge and skills to be able to identify pests such as whitefly , red spider mite and thrips in time and release in a timely manner [...] of agrochemicals and has allowed them to comply with the legal framework for entry into the U.S. market, one of the most important and demanding at a global [...] years, exports of this fruit have had an average annual increase of 1.8% in volume and 11.4% in economic value, with the main client of Mexican chili being

Neoseiulus cucumeris

deutonymph and adult. Eggs are laid on the underside of leaves on leaf hairs or in the axils of main and side veins. They are oval, white and have a diameter [...] bottles or buckets The predatory mite Neoseiulus cucumeris is available in a bottle or bucket ( Thripex , Thripex-V ). Turn and shake the bottle or bucket [...] depends on climate, crop and pest density and should always be adjusted to the particular situation. Start introduction preventively or as soon as the first

Fusarium spp.

causes foot and/or root rot of the infected host plant, and the disease may manifest as wilting, stunting and chlorosis or lesions on the stem and/or leaves [...] Fusarium is widespread and can infect a range of host crops. Many species are considered weak pathogens and can only infect wounded or stressed host plants [...] structures, tools and machinery. Primary infection is either seed-borne or takes place as infection of the roots at the root tip, or in small wounds, for

Black leg of seedlings

are in a sub-optimal condition or suffer from stress, caused for example by too much water, too high or low temperatures or sudden fluctuations in temperature [...] buds fall off. The side roots rot and very little of the root system survives. On the border between air and soil or substrate the plant turns brown. A [...] soil or substrate. Oospores are dispersed when soil particles are moved around by humans or machinery. Pythium can survive very well in the soil or substrate

Rhizoctonia solani

Sterilize the soil or substrate (chemical or heat) Use clean propagation material and disinfected seed Disinfect recirculated water and tools in greenhouse [...] mycelium or sclerotia in the soil and on crop residues. It is also seed-borne. Thanatephorus cucumeris causes diseases such as phytophthora root rot and black [...] seen, but they vary in size and colour and are therefore not a good feature to determine the cause of the disease. Life cycle and appearance of Thanatephorus

Fusarium wilt

Fusarium is widespread and can infect a range of host crops. Many species are considered weak pathogens and can only infect wounded or stressed host plants [...] structures, tools and machinery. Primary infection is either seed-borne or takes place as infection of the roots at the root tip or in small wounds, for [...] fungi cause vascular wilt, root rot, foot and stem rot, leaf lesions, fruit rot, head blight in cereals and post-harvest decay. Fusarium oxysporum is the

Powdery mildew

resistant cultivars whenever available Extra Silicon and/or Calcium nutrition hardens the cell walls and makes it harder for the fungi to enter the leaves [...] apple, pear, outdoor grown rose and other Rosaceae , the fungus causing powdery mildew is extremely sensitive to water and ‘hides’ on the underside of the [...] the colonies appear first and foremost on the upper side of the leaves. In most crops, the white colonies later turn brown or grey. Severely affected leaves

Grapevine powdery mildew

canopy structure and fruit support Flower and cluster symptoms Infection of flowers and young clusters during flowering Poor fruit set and increased flower [...] flowers, and grape clusters, causing yield losses, reduced fruit quality, and increased risk of bunch rot. Powdery mildew thrives under warm and humid c [...] Leaf curling, distortion, and brittleness as infection progresses Reduced photosynthetic activity and weakened vine vigor Shoot and tendril symptoms White

Grey mould

infected after abortion and then provide a large amount of inoculum Extra Silicon and/or Calcium nutrition hardens the cell walls and makes it harder for the [...] environments. It survives in plant parts like bulbs and crop residues or as sclerotia (drought- and cold-resistant structures) in the soil. Damage symptoms [...] occur on leaves, stems, fruits and flowers. On flowers, usually small round specks occur first, called ‘pocks’. These may or may not grow into larger grey-brown